® The trusted leader in manufacturing innovative instrumentation solutions for the worldwide HVAC and process automation markets CUSTOMER SATISFACTION Meet and exceed customer and market expectations INNOVATIVE Sustained R&D and product development COMPETITIVE Highly automated and flexible manufacturing capabilities High-quality, reliable, and readily available products and solutions TRUSTED GLOBAL SUPPORT Global sales and marketing presence ESTABLISHED DWYER BRANDS U S A M A D E By Dwyer By Dwyer By Dwyer

ABOUT US Since the company was founded in 1931, customers have come to recognize Dwyer Instruments, Inc. to stand for quality, reliability, and readily available competitively priced products. As a leading manufacturer in the controls and instrumentation industry, we continue to grow and serve major markets including, but not limited to: HVAC, chemical, agriculture, food, oil and gas, water, wastewater, powder and bulk, and pollution control. Dwyer holds over 650 technical patents and that number grows every year. We are an enthusiastic group of people headquartered in Michigan City, Indiana, with satellite locations around the globe. We take great pride in the intellect and integrity of our employees, who are passionate about the work we do, the products we develop, and the industries we serve. MANUFACTURING EXCELLENCE At Dwyer, it all starts with commitment to meeting the needs of our customers. We strive to make dependable, easy-to-use products. With nearly 90 years of manufacturing expertise, we stand behind our high quality products. Dwyer products are trusted in applications all over the world in nearly every industry. MANUFACTURING & DESIGN CENTER LOCATIONS II DWYER INSTRUMENTS, INC. | dwyer-inst.com

DWYER-INST.COM DWYER ONLINE WEBSITE FEATURES • Product Search • Free Literature – Catalogs, Brochures and Product Selection Guides • Product Application and Technical Guides • Digital Catalogs • Dedicated Support Product Pages • Video Library PRODUCT PAGE FEATURES • Easy Online Ordering • Product Support Library – Instruction Manuals, Catalog Pages and Data Sheets • Product Configurator – Customize a Dwyer product to your specific application needs • Agency Approval Certificates – CE, IECEx, FM, UL, CSA and ATEX • Instructional and Informational Videos • Product Drawings and Photography DWYER CATALOG APP Browse the Dwyer catalog online or download it for instant access offline. The Dwyer Catalog App is available in the iTunes® and Google Play™ stores. IV DWYER INSTRUMENTS, INC. | dwyer-inst.com

CALIBRATION & REPAIR SERVICES NO TIME FOR DOWNTIME FAST & ACCURATE CALIBRATION SERVICES dwyer-inst.com/calibration-nist/ DEDICATED Dwyer’s dedication to quality is unmatched in the industry. We go above and beyond to provide impeccable service paired with quality calibrations. COMMITTED We understand being without your instrument can cost you money. We are committed to getting you your instrument back as fast as possible. ACCURATE You can feel confident by sending your equipment back to the original manufacturer. SEE HOW IT WORKS ORDER ORDER Submit your online order and you’ll receive a return label, instructions and confirmation. SHIP Print the shipping label, pack your product(s) and send to Dwyer. CALIBRATE Monitor the status of your equipment through the entire calibration process. DELIVER Once complete, your products and service documents will be shipped back to you. VI DWYER INSTRUMENTS, INC. | dwyer-inst.com

STANDARD TERMS & CONDITIONS OF SALE shipping point. of any of the material covered hereby shall be for the account of the Buyer and shall be added to the purchase price. removed. They will be maintained in good condition for a minimum period of three years from the date of the original purchase order. DWYER INSTRUMENTS, INC. - TERMS AND CONDITIONS OF SALE – MARCH 15, 2017 1. Prices and Specifications are subject to change without notice. 2. Shipping dates are approximate. They are dependent upon credit approval and subject to delays beyond our control. 3. Terms: Net 30 days to companies with established credit rating. In the event Buyer fails to fulfill previous terms of payment, or in case Seller shall have any doubt at any time as to Buyer’s financial responsibility, Seller may decline to make further deliveries except upon receipt of cash in advance or other special arrangements. 4. Point and Title: All material is sold EXW Ex Works Dwyer Instruments, Inc. Title to all material sold shall pass to buyer upon delivery by Seller to carrier at 5. State and Local Taxes: Any taxes which the Seller may be required to pay or collect upon or with respect to the sale, purchase, delivery, use or consumption 6. Special tooling, dies, silk screens and molds acquired specially to produce goods for Buyer remain the property of Dwyer Instruments, Inc., and may not be 7. Trade Compliance: Buyer acknowledges that the products, software, and technology, including technical information and documents (collectively “Items”), 8. Distribution: Products sold to any entity located in the U.S. must remain in the U.S. unless a Global Distribution Agreement is in force with said entity. OEM’s are excluded from this requirement. Those who violate this term are subject to a reduction of discount, loss of discount, or exclusion from purchasing future products. If you want to be a Global Distributor, please contact your Global Sales Manager in your region. 9. Limited Warranty: The Seller warrants all Dwyer instruments and equipment to be free from defects in workmanship or material under normal use and service for a period of one year from date of shipment. Products qualifying for an extended warranty period will have the extended warranty as expressly indicated on the catalog page, web page, IOM, or will be covered by a specific written agreement that is (i) approved by an officer of Dwyer Instruments, Inc. and (ii) defines the warranty period. If no express statement of extended warranty is made, then the standard 1 year warranty applies. The Extended Limited Warranty only applies to products manufactured after April 1, 2017. The Warranty period extends from the date of shipment to the initial customer and not the project installation date or use. of Dwyer Instruments, Inc., are subject to regulation by agencies of the U.S. government including, but not limited to, the U.S. Department of Commerce. Buyer shall comply with the Export Administration Regulations (EAR) and all applicable U.S.laws and regulations regarding the sale, delivery and transfer of said Items. Buyer shall not, without first obtaining the required licenses, authorizations or approvals from the appropriate U.S. government agency; (i) export, re-export, transfer or divert any Item directly or indirectly to any country or national resident thereof, or any person, entity or country that has restrictions imposed upon them by the U.S. government, (ii) engage in, or knowingly sell to any party engaged in activity related to the development, production, use, testing, or maintenance of Weapons of Mass Destruction, including uses related to nuclear, missile, chemical or biological warfare, or (iii) engage in, or knowingly sell to any party engaged in activity related to the development, production, use, or maintenance of any safeguarded or unsafeguarded nuclear fuel facility or components for such facilities. Buyer shall fully cooperate with Seller, without charge, in any official audit or inspection by an authorized agent, official, employee, or accredited representative of the U.S. government. Buyer shall indemnify and hold Seller harmless from, or in connection with, any violation of this Section by Buyer, its employees, consultants, agents, or customers. The obligations, requirements and claims described herein shall survive the expiration of any business relationship with Dwyer Instruments, Inc., including its divisions, subsidiaries and affiliated companies. o Humidity Sensors o Batteries o Electro-Chemical Gas Sensors o Snap Switches o Any component which exceed its normal life cycle o Other Specific items added as required. Specific warranty exclusions include, but are not limited to: • Specific product components not covered by the extended warranty: • Normal or excessive wear and tear is not cause for warranty replacement. • Products not properly maintained, operated, installed, or use in an application not suited for the product. • Modifications, alterations, changes, or additions outside those which are required for normal operation. • Failure to notify Dwyer of any defect within a reasonable time. • Damage which the customer has not taken timely action to minimize or mitigate. • Products on which the labels, markings, nameplates, etc. have been tampered with. • Products which contain broken factory seals or have been tampered with shall void warranty. Liability under this warranty is limited to repair or replacement EXW Ex Works Dwyer Instruments, Inc. of any parts which prove to be defective within that time or repayment of the purchase price at the Seller’s option. All products must be returned to the Seller, transportation prepaid, unless other arrangements have been pre-approved by Seller. All technical advice, recommendations and services are based on technical data and information which the Seller believes to be reliable and are intended for use by persons having skill and knowledge of the business, at their own discretion. In no case is Seller liable beyond replacement of equipment EXW Ex Works Dwyer Instruments, Inc. or the full purchase price. This warranty does not apply if the maximum ratings label is removed or if the instrument or equipment is abused, altered, used at ratings above the maximum specified, or otherwise misused in any way. THIS EXPRESS LIMITED WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER REPRESENTATIONS MADE BY ADVERTISEMENTS OR BY AGENTS AND ALL OTHER WARRANTIES, BOTH EXPRESS AND IMPLIED. THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE FOR GOODS COVERED HEREUNDER. DEFECTIVE MATERIAL SHALL BE TO SECURE REPLACEMENT THEREOF AS AFORESAID. THE SELLER SHALL NOT IN ANY EVENT BE LIABLE FOR THE COST OF ANY LABOR EXPENDED ON ANY SUCH MATERIAL OR FOR ANY SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES TO ANYONE BY REASON OF THE FACT THAT IT SHALL HAVE BEEN NON-CONFORMING OR DEFECTIVE. 10. Buyer’s Remedies: THE BUYER’S EXCLUSIVE AND SOLE REMEDY ON ACCOUNT OF OR IN RESPECT TO THE FURNISHING OF NON-CONFORMING OR 11. Acceptance: All orders shall be subject to the terms and conditions contained or referred to in the Seller’s quotation, acknowledgment, and to those listed here and to no others whatsoever. By placing an order you accept our terms and conditions. No waiver, alteration or modification of these terms and conditions shall be binding unless in writing and signed by an executive officer of the Seller. All orders are subject to written acceptance by Dwyer Instruments, Inc., Michigan City, Indiana, U.S.A. VIII DWYER INSTRUMENTS, INC. | dwyer-inst.com

TERMINAL UNIT S N O I T A C I L P P A T C U D O R P CHILLER PLANT X DWYER INSTRUMENTS, INC. | dwyer-inst.com

MIDSTREAM REFINERY/CHEM PLANT S N O I T A C I L P P A T C U D O R P BUILDING BALANCING XII DWYER INSTRUMENTS, INC. | dwyer-inst.com

CONTAINMENT CHAMBER/BOX S N O I T A C I L P P A T C U D O R P CLEAN WATER XIV DWYER INSTRUMENTS, INC. | dwyer-inst.com

KEY MARKETS INNOVATION AWARDS HVAC • Building Automation • Test Equipment • Controlled Environments • Original Equipment (Chillers, Boilers, Air Handlers, Cooling Towers) • Valve Automation PROCESS AUTOMATION • Water and Wastewater • Pharmaceutical • Agriculture and Livestock • Powder and Bulk • Industrial Process • Mining and Heavy Earth Moving • Oil, Gas and Petrochemical • Power • Valve Automation The ACHR News is the leading trade magazine in the heating, ventilating, air conditioning, and refrigeration industries. GOLD • HVAC Mobile Meter® Software Test Instrument App • PredictAir™ Application Software • Air Velocity Transmitter | Series AVUL SILVER Wireless Hydronic Balancing Kit • Universal Handheld Test Instrument | Model UHH2 Series 490W • Wireless Hydronic Balancing Kit | Series 490W • Hydronic Application Software BRONZE • SMART Air Hood® Balancing Instrument | Series SAH • Hydronic Differential Pressure Manometer | Series 490A • Insertion Electromagnetic Flow Transmitter | Series IEF XVI DWYER INSTRUMENTS, INC. | dwyer-inst.com

RECENT INNOVATIONS DIFFERENTIAL PRESSURE TRANSMITTER - LOW RANGES SERIES 616KD-LR • Wide selection of ranges down to 0.1 in w.c. and accuracies cover numerous applications minimizing components and standardizing on design • Simple calibration push-buttons to set zero and span, saving time installing and maintaining over the service life • Cost effective and compact device suitable for OEM applications where space, simplicity, and value are key PAGE 59 WET/WET DIFFERENTIAL PRESSURE TRANSMITTER - WITH REMOTE SENSORS SERIES 629C-RS remote pressure sensors • Same benefits as the 629C Wet/Wet Differential Pressure Transmitter with the added convenience of using • Available with standard cable and armored cable versions with 10 or 20 feet shielded cable • Remote sensors option reduces installation cost • Sensors convert pressure changes into a standard 4-20 mA output signal or field selectable voltage PAGE 76 DIFFERENTIAL PRESSURE TRANSMITTER SERIES 629HLP • Measurement of small pressure differences of high-static line pressures • ±1% accuracy through the entire operating temperature range from -10 to 60°C (14 to 122°F) • For measuring over-pressure, under-pressure, and differential pressure • 4 different ranges, up to 6 bars PAGE 77 WIRELESS HYDRONIC DIFFERENTIAL PRESSURE MANOMETER SERIES 490W • Familiar ergonomic mobile device interface • Full comprehensive kit for direct to job site capability on almost any application or hydronic valve • Flow conversion capability built into the app minimizes steps in the balancing process • Wide ranges and high resolution. Even at the 500 psid range, technicians can see readings PAGE 172 AVERAGING AIR FLOW GRID SERIES 160G • New lightweight pole for longer periods of use with larger pole diameter for ergonomics • Up to 48˝ (122 cm) of reach • 16 sensing points provides an accurate average flow XVIII DWYER INSTRUMENTS, INC. | dwyer-inst.com PAGE 189

RECENT INNOVATIONS INSERTION THERMAL ENERGY METER SERIES IEFB • Field configurable • Integral or remote display for ultimate flexibility • Complies with high accuracy requirements of EN 1434-1, ASTM E3137, CSA C900.1-13 for accurate heat measurement PAGES 292-293 REMOTE DISPLAY FOR SERIES IEF AND IEFB SERIES A-IEF • Use to set up the IEF/IEFB and adjust the settings or indicate remotely • Varying cable lengths of up to 100 ft (30 m) allows for flexible installation on a wall or pipe mount • Easy to install and wire in the field PAGE 293 INSERTION ELECTROMAGNETIC FLOW TRANSMITTER SERIES IEF • Field configurable • Integral or remote displays allow for ultimate flexibility • Multiple display configurations with a single unit PAGE 294 INSERTION ELECTROMAGNETIC FLOW TRANSMITTER KIT A-IEF-KIT • Accessory setup kit • Ensures exact installation application for the Series IEF • Includes set up display, thickness gage, measuring tape and universal power adapter PAGE 294 ULTRASONIC ENERGY METERS SERIES TUF • Manufactured to comply with EN1434-1 requirements • Compact energy monitoring • BACnet or Modbus® communication outputs XX DWYER INSTRUMENTS, INC. | dwyer-inst.com PAGE 295 Modbus® is a registered trademark of Schneider Automation, Inc.

® DIFFERENTIAL PRESSURE Pressure Gages E R U S S E R P | I I E D U G N O T C E L E S SERIES Ranges Service 2000 - pages 20-21 -0.05 to 0.2 in w.c.(-10 to 50 Pa) up to 0 to 30 psi (0 to 30 kPa) Air and non-combustible, compatible gases DM-1000 - page 25 0.25 to 100 in w.c. (60 Pa to 24.88 kPa) (Bi-directional ranges available) 2-5000 - pages 26-27 0.5 in w.c. to 5 psi (125 Pa to 3 kPa) Air and non-combustible, compatible gases Air and compatible gases Wetted Materials Consult factory Housing Die cast aluminum case and bezel Consult factory Glass filled plastic Consult factory Glass filled nylon Lens Accuracy Pressure Limits Clear acrylic ±2 to 4% FS for most models. ±1 to 2% FS with HA option -20˝ Hg to 15 psig (-0.677 bar to 1.034 bar); MP option: 35 psig (2.41 bar); HP option: 80 psig (5.52 bar). 20 to 140°F (-6.67 to 60°C) N/A ±1% FS (2% FS for ranges 1 in w.c. and below) Clear acrylic ±5% FS 2 psi (14 kPa) for ≤5 in w.c. 11 psi (75 kPa) for ≥10 in w.c. 30 psig (2.067 bar) 0 to 140°F (-18 to 60°C) 1/8˝ (3 mm) ID tubing 20 to 120°F (-6.67 to 48.9°C) Barbed for 3/16˝ ID tubing or 1/8˝ male NPT Temperature Limits Process Connection 1/8˝ female NPT duplicate high and low pressure Enclosure Rating taps N/A NEMA 4X (IP66) N/A DIFFERENTIAL PRESSURE Bezels 2000-SS - page 22 Bezel 304 brushed stainless steel 4-3/4˝ (120.7 mm) OD SERIES Accessory Material Dimensions Aesthetics/Function Tapered brushed/matte SS finish Part Sold Separately Yes Part Number 420141-40 2000-SB - page 22 Bezel 304 stainless steel 4-3/4˝ (120.7 mm) OD Electro polished Ra 16 Yes 420141-10 2000-CB - page 22 Bezel Chrome plated aluminum 4-3/4˝ (120.7 mm) OD Chrome finish Yes 420141-00 DH3-SS/3000MR(S)-SS/ 605-SS - pages 36, 42 & 64 Bezel 304 brushed stainless steel 4-3/4˝ (120.7 mm) OD Tapered brushed/matte SS finish Yes 815999-10 These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 2 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® DIFFERENTIAL PRESSURE Pressure Gages/Switches E R U S S E R P | I E D U G N O T C E L E S I SERIES Ranges Service Wetted Materials Housing Switch Type Accuracy Pressure Limits DHII - page 34 0.25 to 100 in w.c. (60 Pa to 24.88 kPa) (Bi-directional ranges available) Air and non-combustible, compatible gases Consult factory Aluminum, glass (2) SPDT ±0.5% FS DH - page 35 0.25 to 100 in w.c. (60 Pa to 24.88 kPa) (Bi-directional ranges available) Air and non-combustible, compatible gases Consult factory ABS plastic, UL approved 94 V-0 (2) SPDT ±0.5% FS 2 psi (≤2.5 in w.c.); 5 psi (5 to 50 in w.c.); 9 psi (100 in w.c.) 2 psi (≤2.5 in w.c.); 5 psi (5 to 50 in w.c.); 9 psi (100 in w.c.) Temperature Limits Process Connection 1/8˝ female NPT 32 to 140°F (0 to 60°C) Enclosure Rating NEMA 4 (IP66) 32 to 140°F (0 to 60°C) Compression fitting for 1/8˝ ID tubing or barbed fitting for 3/16˝ ID tubing NEMA 4X (IP66) LOW DIFFERENTIAL PRESSURE Pressure Switches DH3 - page 36 0.25 to 100 in w.c. (60 Pa to 24.88 kPa) (Bi-directional ranges available) Air and non-combustible, compatible gases Consult factory Die cast aluminum case and bezel N/A (2) SPDT ±0.5% FS (±1% or ±1.5 for certain ranges) 2 psi (≤2.5 in w.c.); 5 psi (5 to 50 in w.c.); 9 psi (100 in w.c.) 32 to 140°F (0 to 60°C) 1/8˝ female NPT A3000 - pages 38-39 0 to 0.25 in w.c. (0 to 60 Pa) up to 0 to 150 in w.c. (0 to 30 kPa) Air and non-combustible, compatible gases Consult factory (2) DPDT ±2% FS (±3% or 4% for certain ranges) -20˝ Hg to 25 psig (-0.677 bar to 1.72 bar); MP option: 35 psig (2.41 bar); HP option: 80 psig (5.52 bar). 20 to 120°F (-6.67 to 48.9°C) 1/8˝ female NPT N/A N/A SERIES Set Point Range Service ADPS - page 45 .08 to 20 in w.c. (20 to 5000 Pa) Compatible gases EDPS - page 45 .08 to 20 in w.c. (20 to 5000 Pa) Compatible gases 1800 - page 47 .07 to 85 in w.c. (.017 to 21 kPa) Compatible gases 1900 - page 49 .07 to 20 in w.c. (.017 to 5 kPa) Compatible gases Wetted Materials Silicone, PA 6.6, and Polystyrene 1% No -4 to 185°F (-20 to 85°C) 40 in w.c. (10 kPa) Temperature Limits Pressure Limits Power Requirement None Repeatability Adjustable Deadband Set Point Indication Yes Enclosure Rating GP Switch Type SPDT Multiple Stages No Process Connection Hose connection for 5/16˝ OD and 1/4˝ ID tubing Silicone, PA 6.6, and materials UL 94 V-0 rated -4 to 185°F (-20 to 85°C) 40 in w.c. (10 kPa) None 1% No Consult factory Consult factory -30 to 180°F (-34 to 82°C) 10 psig (69 kPa) None 2% No -30 to 180°F (-34 to 82°C) 45 in w.c. (11.2 kPa) None 3% No Yes UL 94 V-0 rated SPDT No Hose connection for 5/16˝ OD and 1/4˝ ID tubing No GP, WP, or EXP SPDT No 1/8˝ female NPT No GP, WP, or EXP SPDT No 1/8˝ female NPT These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 4 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® LOW DIFFERENTIAL PRESSURE Pressure Switches E R U S S E R P | I E D U G N O T C E L E S I SERIES Set Point Range 1620 - page 53 .15 to 24 in w.c. (.04 to 6 kPa) 1630 - page 53 .05 to 12 in w.c. (.012 to 3 kPa) Service Wetted Materials Compatible gases Consult factory Compatible gases Consult factory -30 to 130°F (-34 to 54°C) 50 in w.c. (12.41 kPa) 1% No Temperature Limits Pressure Limits Power Requirement None Repeatability Adjustable Deadband Set Point Indication No Enclosure Rating Switch Type Multiple Stages Process Connection 1/8˝ female NPT GP and WP (2) SPDT Yes -30 to 110°F (-34 to 43°C) 10 psig (69 kPa) None 1% No Yes GP and WP SPDT No 1/8˝ female NPT PG - page 54 1 in w.c. to 5 psig (.25 kPa to 3.4 bar) Compatible gases Fairprene, brass, steel, and aluminum -10 to 180°F (-23 to 82°C) Consult factory None 1% No 1950 - page 55 .03 to 20 in w.c. (.007 to 5 kPa) Compatible gases Consult factory -40 to 140°F (-40 to 60°C) 45 in w.c. (11.2 kPa) None Consult factory No Yes GP, WP, or EXP SPDT or DPDT No 1/8˝ female and 1/2˝ male NPT No WP and EXP SPDT No 1/8˝ female NPT LOW DIFFERENTIAL PRESSURE - NON-INDICATING Pressure Transmitters and Transducers SERIES Ranges Accuracy 616KD - page 58 1 to 20 in w.c. (250 to 5000 Pa) to 5000 Pa (Bi-directional available) 616KD-A: ±0.25% FS; 616KD-B: ±1% FS; 616KD-C: ±2% FS Consult factory Wetted Materials Comp. Temp. Limits 20 to 122°F (-6.67 to 50°C) Oper. Temp. Limits Output Signal 0 to 140°F (-17.8 to 60°C) 4 to 20 mA or field selectable 0 to 10/0 to 5/2 to 10/1 to 5 V Screw-type terminal block Elec. Connection Process Connection Barbed for 1/8˝ and 3/16˝ ID rubber or vinyl Enclosure Rating tubing NEMA 1 (IP20) 668B/D - page 60 .1 to 100 in w.c. (25 to 25000 Pa) (Bi-directional available) ±0.8% FS 608 - page 74 0.1 to 25 in w.c. (25 to 6200 Pa) (Bi-directional available) ±0.5% or ±0.25% FS Consult factory 40 to 170°F (4.4 to 77°C) 0 to 170°F (-18 to 77°C) 4 to 20 mA, 0 to 10 VDC, or 0 to 5 VDC Consult factory 0 to 160°F (-18 to 71°C) -20 to 185°F (-28 to 85°C) 4 to 20 mA Screw-type terminal block 3/16˝ OD barbed brass for 1/8˝ ID push-on tubing UL 94 V-0 rated Screw-type terminal block, Two 1/2˝ female NPT conduit 1/4˝ female NPT NEMA 4X (IP66) These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 6 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® LOW DIFFERENTIAL PRESSURE - INDICATING Pressure Transmitters and Transducers E R U S S E R P | I E D U G N O T C E L E S I SERIES Ranges 616W - page 62 6 in w.c. to 2.5 kPa DM-2000 - page 63 .1 to 5 in w.c. (Bi-directional available) 605 - page 64 Vacuum, .5 to 50 in w.c. (60 to 1500 Pa) ±0.25% FS, display accuracy ±0.5% Consult factory Accuracy Wetted Materials Comp. Temp. Limits N/A Oper. Temp. Limits Output Signal Elec. Connection Process Connection Barbed for 1/8˝ and 3/16˝ ID rubber or vinyl 0 to 150°F (-17.8 to 66°C) 4-20 mA (2-wire), 0-5 VDC, or 0-10 VDC (3-wire) 4-20 mA 3-wire terminal block for 16 to 26 AWG ±1% FS Consult factory N/A 20 to 120°F (-7 to 49°C) Screw-type terminal block 1/8˝ ID tubing ±0.5% or ±2% FS Consult factory 32 to 120°F (0 to 48.9°C) 20 to 120°F (-6.67 to 48.9°C) 4-20 mA Screw-type terminal block 1/8˝ female NPT Enclosure Rating tubing NEMA 4X (IP66) N/A N/A WET-WET DIFFERENTIAL PRESSURE Pressure Transmitters and Transducers SERIES Ranges 3100 - pages 70-71 6 in w.c. to 0-1000 psig 636D - page 75 15 to 300 psi 629C - page 76 5 to 500 psid (0.5 to 30 bar) 629C-3V - page 76 5 to 500 psid (0.5 to 30 bar) Accuracy Wetted Materials ±0.075% FS 316L SS ±0.5% FS 316L SS ±0.50% FS 316, 316L SS Comp. Temp. Limits N/A Oper. Temp. Limits Output Signal -40 to 185°F (-40 to 85°C) 4-20 mA or HART® Communication -20 to 180°F (-29 to 82°C) -40 to 212°F (-40 to 100°C) 4-20 mA or 1 to 5 VDC Elec. Connection (2) 1/2˝ female NPT conduit, screw terminal Process Connection 1/4˝ female NPT Enclosure Rating NEMA 4X (IP66) 2´ (61 cm) cable, 3/4˝ female NPT conduit 1/2˝ female NPT NEMA 4 (IP66) 0 to 175°F (-18 to 79°C) 0 to 200°F (-18 to 93°C) 2-wire: 4-20 mA; 3-wire: Selectable 0-5, 1-5, 0-10, or 2-10 VDC Screw-type removable terminal block; 1/2˝ female NPT conduit 1/4˝ female NPT NEMA 4X (IP66) ±0.50% FS 316, 316L SS, Brass 360, Copper, Reinforced acetal copolymer 0 to 175°F (-18 to 79°C) 0 to 200°F (-18 to 93°C) 2-wire: 4-20 mA; 3-wire: Selectable 0-5, 1-5, 0-10, or 2-10 VDC Screw-type removable terminal block; 1/2˝ female NPT conduit 1/4˝ female NPT Non-LCD designed to meet NEMA 4X (IP66) HART® is a registered trademark of Hart Communication Foundation These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 8 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SINGLE PRESSURE Pressure Gages E R U S S E R P | I I E D U G N O T C E L E S SERIES Ranges Service Wetted Materials Housing Accuracy Pressure Limits Temperature Limits Ambient: -40 to 140°F (-40 to 60°C); LPG4/LPG5 - pages 81-82 -235 to 160 in w.c. (-60 to 40 kPa) Compatible gases/liquids Brass, bronze or SS LPG4: Drawn Steel; LPG5: Chrome plated LPG4 ±1.5% FS; LPG5 ±3%-2%-3% FS 100% FS LPG5 -4 to 140°F (-20 to 60°C) Process Connection 1/4˝ male NPT Enclosure Rating N/A SGY & SGZ - pages 83 -30˝ Hg to 1000 psi (-1 to 70 bar) Compatible gases/liquids Brass, bronze or SS 304 SS ±1.5 to ±2.5% FS 100% FS -4 to 140°F (-20 to 60°C) 1/4˝ male NPT NEMA 3 (IP54) 765 - page 83 30˝ Hg to 20,000 psi (-100 to 135,000 kPa) Compatible gases/liquids 316L SS, Bourdon tube Phenolic plastic with safety blow-out back ±0.5% FS ANSI/ASME (Grade 2A) 110 to 125% FS -40 to 200°F (-40 to 93°C) 1/4˝ or 1/2˝ male NPT IP65 (NEMA 4) HIGH SINGLE PRESSURE - INDICATING Pressure Transmitters and Transducers SERIES Ranges Accuracy DSGT - page 87 30 to 20,000 psig and compound ranges ±0.25% FS EDA - page 89 20 to 3000 psig ±1% FS 17-4 SS, 316 SS Wetted Materials Comp. Temp. Limits N/A Oper. Temp. Limits Output Signal 14 to 140°F (-10 to 60°C) 4-20 mA Elec. Connection 3ˊ flying leads Process Connection 1/2˝ male NPT Enclosure Rating NEMA 4X 316L SS 32 to 122°F (0 to 50°C) 20 to 140°F (-6.6 to 60°C) 4-20 mA, 1-6 VDC, 1-5 VDC, 0-5 VDC, or 0-10 VDC Screw-type removable terminal blocks with (2) 1/2˝ female NPT conduit connections 1/4˝ male NPT, 1/4˝ male BSPT, or 7/16˝ SAE NEMA 4X (IP66) 626/628-CB - pages 102-103 Up to 300 psia, 8000 psig, 16 bar abs, 550 bar 626: ±0.25% FS; 628: ±1% FS 316, 316L SS 0 to 175°F (0 to 79°C) 0 to 200°F (0 to 94°C) 4-20 mA Terminal block, 1/2˝ female NPT conduit 1/2˝ female NPT IWP - page 105 30 to 1000 psig 3200G - pages 106-107 -14.5 psig to 8500 psig ±0.5% FS ±0.075% FS 304 and 316 SS -22 to 203°F (-30 to 95°C) 32 to 158°F (0 to 70°C) 4-20 mA 316L SS N/A -40 to 185°F (-40 to 85°C) 4-20 mA or HART® Communication (2) 1/2˝ female NPT conduit, screw terminal 1/4˝ male or female NPT or BSPT NEMA 4X (IP66) 1/2˝ female NPT 1/2˝ female NPT IP65 NEMA 4X (IP66) HART® is a registered trademark of Hart Communication Foundation These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 10 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SINGLE PRESSURE Pressure Switches E R U S S E R P | I E D U G N O T C E L E S I SERIES Set Point Range EDA - page 89 20 to 3000 psig (1.38 to 206 bar) Service Wetted Materials Compatible liquids or gases 316 SS 20 to 140°F (-6.6 to 60°C) 4500 psig (310 bar) 12-30 VDC/AC Yes Temperature Limits Pressure Limits Power Requirement Repeatability 0.5% Adjustable Deadband Set Point Indication Enclosure Rating Switch Type Multiple Stages Process Connection Yes WP (2) SPDT No 1/4˝ male NPT A1PS/A1VS - page 95 28˝ Hg VAC to 500 psig (711 mm Hg VAC to 34.5 bar) Compatible liquids or gases Zinc and Buna-N SA1100 - page 92 10 to 500 psig (.7 to 34 bar) 1000W/E - page 93 5 to 1400 psig (.48 to 96.5 bar) A1F - page 94 2 to 450 psig (.14 to 10.3 bar) Compatible liquids or gases Aluminum, brass, or 316 SS with Buna-N or fluorocarbon -30 to 180°F (-35 to 77°C) 3000 psig (207 bar) Compatible liquids or gases Aluminum or 316 SS with polyamide, 316 SS, or Teflon® -30 to 170°F (-35 to 77°C) 3000 psig (207 bar) Compatible liquids or gases Fluorocarbon and 316 SS -40 to 175°F (-40 to 80°C) 750 psig (51 bar) -31 to 185°F (-35 to 85°C) 600 psig (41 bar) None None None None Consult factory Yes Consult factory No Consult factory No Consult factory No DA/DS - pages 90 30˝ Hg VAC to 8000 psig (762 mm Hg VAC to 551 bar) Compatible liquids or gases Brass, 403 SS, or 316 SS -10 to 180°F (-23 to 82°C) 8000 psig (551 bar) None 1% Yes Yes Yes Yes Yes GP, WP, or EXP WP and EXP WP or EXP GP or WP SPDT or DPDT Yes SPDT or DPDT No SPDT or DPDT No SPDT No Yes GP SPDT No GP/WP: 1/4˝ male NPT or 1/2˝ male NPT; EXP: 1/2˝ male NPT and 1/4˝ female NPT 1/4˝ or 1/2˝ female NPT 1/4˝ female NPT 1/4˝ female and 1/2˝ male NPT 1/4˝ male NPT These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. Teflon® is a registered trademark of E.I. Dupont De Nemours and Company 12 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® HIGH SINGLE PRESSURE - NON-INDICATING Pressure Transmitters and Transducers E R U S S E R P | I I E D U G N O T C E L E S SERIES Ranges 681 - page 98 1 to 100 psi 644 - page 99 Vacuum, 15 to 1000 psig 682 - page 100 25 to 10,000 psi 672 - page 100 10 to 400 in w.c. 673 - page 101 Compound, 1 to 1000 psi Accuracy ±0.20% FS ±0.05% FS ±0.13% FS ±0.25% FS ±0.25% FS Wetted Materials 316L SS 17-4 PH SS 17-4 PH SS Comp. Temp. Limits 20 to 180°F (-7 to 80°C) Oper. Temp. Limits Output Signal -40 to 260°F (-40 to 125°C) 4-20 mA Elec. Connection 15 ft (4.5 m) multi-conduit cable Process Connection 1-1/2˝ or 2˝ sanitary clamp -4 to 140°F (-20 to 60°C) -40 to 185°F (-40 to 85°C) 0-10 VDC (4-wire) or 4-20 mA (2-wire) 3ˊ cable or 6-pin male bayonet connector 1/4˝ male NPT Enclosure Rating NEMA 4X (IP66) NEMA 4X (IP66) -4 to 176°F (-20 to 80°C) -40 to 260°F (-40 to 125°C) 4-20 mA 2 ft (61 cm) multi-conductor cable 1/4˝ male or female NPT or BSPT NEMA 4X (IP66) 318 Duplex SS, Ceramic, fluoroelastomer -5 to 140°F (-20 to 60°C) -40 to 212°F (-40 to 100°C) 4-20 mA or 0-5 VDC 17-4 PH SS 4 to 212°F (-20 to 100°C) -40 to 260°F (-40 to 125°C) 4-20 mA Large DIN 43650 connector with mating plug 1/4˝-18 male NPT 2 ft (61 cm) multi-conductor cable 1/4˝ male NPT NEMA 4X (IP66) NEMA 4X (IP66) These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. 14 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s n o i t a c i l Differential pressure gage assists operator in adjusting venturi pressure drop in dust scrubber. Gasoline vapor recovery system. This scrubber design removes unwanted dust or particulate matter from air or gas using an adjustable throat venturi. To adjust the pressure drop across the venturi, a jack-screw-actuated sliding vane varies the slot width. A permanently mounted Dwyer® Magnehelic® differential pressure gage indicates the venturi pressure drop while the operator adjusts to the desired or design setting. Where water may possibly enter the gage sensing lines, as in this application, drop legs with drain valves are needed to permit draining the lines at their lowest point. Good engineering practice dictates that the Magnehelic® gage always be mounted above the sensing tap when possible to prevent moisture accumulation in the lines and gage. At minimum, mount the gage above the lowest point in the sensing lines. Some area pollution control agencies require that 90% or more of gasoline vapor vented at service stations when fuel is dispensed must be prevented from venting to atmosphere. Using a dual hose dispenser, this vapor recovery system is a vacuum assist, vapor burnoff type. The blower creates a low vacuum at the nozzle, routing vapor from the automobile tank to underground storage tanks. As uncondensed vapor pressure reaches 2 in to 3 in w.c. pressure, a Dwyer® 1950 Series explosion-proof differential pressure switch activates a rooftop burnoff unit, which ignites excess vapor. The Magnehelic® differential pressure gage mounted on the station wall monitors tank pressure to verify system operation. The gage is calibrated in inches of gasoline, from +6 to -2. This allows the operator to determine the necessary level correction due to tank pressure prior to dipsticking the tanks through the fill pipe. p p A i l a c p y T Dwyer® gages indicate pressurization of special rooms. Filling scuba diver air tanks. A zero-center Dwyer® Magnehelic® differential pressure gage with an 0.25 in w.c. range either side of zero makes an effective monitor for proper operation of room pressurization systems. In the example, differential gage B has its high pressure port open to room 2 and its low pressure port to room 1; gage A has its high pressure port open to room 1 and its low pressure port open to the atmosphere. With the makeup air supply damper adjusted properly, room 2 will be a higher pressure than room 1 which is at higher than atmospheric pressure; both gages will read positive. Should the air supply to room 2 be obstructed, gage B will read negative. If the air supply fails entirely, both gages will read zero. For even better security, a Photohelic® switch/gage will provide automatic alarm or start-up of a backup system. The Dwyer® Series DPG with oxygen cleaning and 5000 psi range is used in gas blending applications for filling scuba diver’s air tanks. The DPG is the master mixing gage in this manifold apparatus. Two or three gases may be blended with the manifold to produce the appropriate blend of breathable gas depending on the diver and the depths they will reach. With the flow adjustment knobs and the 0.25% full-scale accuracy DPG, precise tank charging rates are maintained. 16 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P y c a r u c c A r o s n e S e r u s s e r P ® PRESSURE SENSOR ACCURACY V I DEO O N L I N E What is accuracy? The International Electrotechnical Commission (IEC) definition of accuracy is maximum positive and negative deviation from the specified characteristic curve observed in testing a device under specified conditions and by a specified procedure. Unfortunately when it comes to defining accuracy for a pressure sensor it’s more complicated. Accuracy has a large effect on the cost of a pressure sensor or even more importantly, the quality or efficiency of the process it is measuring. It is important to understand what factors determine accuracy and what questions to ask when selecting a sensor so that an apples-to-apples comparison can be made instead of apples-to-oranges. Even though there isn’t a defined standard for pressure sensor accuracy there is an IEC standard that defines factors that make-up accuracy. IEC 61298-2 states that accuracy must include Hysteresis, Non-Repeatability and Non-Linearity. Non-Repeatability and Hysteresis are well defined. Hysteresis is the maximum difference in sensor output at a pressure when that pressure is first approached with pressure increasing and then approached with pressure decreasing during a full span pressure cycle. Non-Repeatability is the maximum difference in output when the same pressure is applied, consecutively, under the same conditions and approaching from the same direction. Output Output 0 100% 0 100% Pressure (% FS) Non-Repeatability Pressure (% FS) Hysteresis Where manufactures start to differentiate is with Non-Linearity. IEC 61298-2 lists three methods of Non-Linearity, the two most popular methods used by sensor manufactures are the Best Fit Straight Line Non-Linearity and Terminal Point Non-Linearity. Usually the method of non-linearity used will be specified with the sensors accuracy as BFSL or Terminal Point Method. Why is it important to understand the difference between these two methods? Based on the Non-Linearity characteristics of a sensor, it could have two vastly different Non-Linearity percentages. The following diagram shows how the same sensor can have two Non-Linearity percentages. 0.25% BFSL Output 0.25% 0.25% Output = 0.5% 0.5% Terminal Point 0 100% 0 100% Pressure (% FS) Best Fit Straight Line Non-Linearity Pressure (% FS) Terminal Point Non-Linearity 18 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES 2000 MAGNEHELIC® DIFFERENTIAL PRESSURE GAGES Indicate Positive, Negative or Differential, Accurate within 1% E R U S S E R P RUBBER PRESSURE RELIEF PLUG WILL UNSEAT ITSELF WHEN GAGE IS OVERPRESSURIZED 17/32 [13.49] 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1/8 FEMALE NPT LOW PRESSURE CONNECTION 7/16 [11.11] .025 [.64] SPACE CREATED BY 3 SPACER PADS WHEN SURFACE MOUNTED. DO NOT OBSTRUCT. PROVIDES PATH FOR RELIEF OF OVERPRESSURE. 1-1/4 [31.75] Ø4-1/2 [114.3] 15/32 [11.91] 1-11/16 [42.86] Ø4-3/4 [120.65] YEAR LIMITED WARRANTY [3] 6-32 X 3/16 [4.76] DEEP HOLES EQUALLY SPACED ON A Ø4-1/8 [104.78] BOLT CIRCLE FOR PANEL MOUNTING 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1-3/4 [44.45] 1/2 [12.70] 11/16 [17.46] 1/8 FEMALE NPT LOW PRESSURE CONNECTION Standard Magnehelic® gage V I DEO O N L I N E High Accuracy Magnehelic® gage Note: Shown with optional -SS bezel ø5-1/2 [139.70] MOUNTING RING 17/32 [13.49] 1-1/4 [31.75] ø4-3/4 [120.65] PANEL CUTOUT 1/8 FEMALE NPT HIGH PRESSURE CONNECTION ø5 [127] ø4-47/64 [120.27] 2-17/32 [64.29] 3/16 [4.76] 11/16 [17.46] ø4-1/2 [114.3] 15/32 [11.91] 1-3/4 [44.45] 1/2 [12.70] 1/8 FEMALE NPT LOW PRESSURE CONNECTION Select the Series 2000 Magnehelic® Differential Pressure Gages for a versatile low differential pressure gage with a wide choice of 81 models and 27 options to choose from. Using Dwyer’s simple, frictionless Magnehelic® gage movement, it quickly indicates air or non-corrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration, over-pressures and is weatherproof to IP67. Select the –HA High Accuracy Magnehelic® gage option for an accuracy within 1% of full-scale. Also included with the –HA option at no extra cost are a mirrored scale overlay and a 6 point calibration certificate. FEATURES/BENEFITS • Easy to read gage through undistorted plastic face permits viewing from far away • Patented design provides quick response to pressure changes means no delay in assessing critical situations • Durable and rugged housing and high-quality components combine to provide long- service life and minimized down-time • High accuracy option is twice as accurate as the standard Magnehelic® gage s e g a G e r u s s e r P l a i t n e r e f f i D APPLICATIONS • Filter monitoring • Air velocity with Dwyer pitot tube • Blower vacuum monitoring • Fan pressure indication • Duct, room or building pressures • Clean room positive pressure indication ACCESSORIES Model A-432 A-605 A-605B A-605C Description Portable kit; combine carrying case with any Magnehelic® gage of standard range, except high pressure connection. Includes 9 ft (2.7 m) of 3/16˝ ID rubber tubing, standhang bracket and terminal tube with holder Air filter gage accessory kit; adapts any standard Magnehelic® gage for use as an air filter gage. Includes aluminum surface mounting bracket with screws, two 5 ft (1.5 m) lengths of 1/4˝ aluminum tubing, two static pressure tips and two molded plastic vent valves, integral compression fittings on both tips and valves Air filter gage accessory kit; air filter kit with two plastic open/close valves, two 4˝ steel static tips, plastic tubing and mounting flange Air filter gage accessory kit; air filter kit with two plastic open/close valves, two plastic static tips, plastic tubing and mounting flange SPECIFICATIONS Service: Air and non-combustible, compatible gases (natural gas option available). Note: May be used with hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi. Wetted Materials: Consult factory. Housing: Die cast aluminum case and bezel, with acrylic cover. Exterior finish is coated gray to withstand 168 hour salt spray corrosion test. Accuracy: ±2% (-HA model ±1) of FS (±3% (-HA ±1.5%) on -0, -100PA, -125PA, -10MM and ±4% (-HA ±2%) on -00, -60PA, -6MM ranges), throughout range at 70°F (21.1°C). Pressure Limits: -20 in Hg to 15 psig (-0.677 to 1.034 bar); MP option: 35 psig (2.41 bar); HP option: 80 psig (5.52 bar). Enclosure Rating: IP67. Overpressure: Relief plug opens at approximately 25 psig (1.72 bar), standard gages only.u Temperature Limits: 20 to 140°F* (-6.67 to 60°C). -20°F (-28°C) with low temperature option. Size: 4˝ (101.6 mm) diameter dial face. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Process Connections: 1/8˝ female NPT duplicate high and low pressure taps - one pair side and one pair back. Weight: 1 lb 2 oz (510 g), MP & HP 2 lb 2 oz (963 g). Standard Accessories: Two 1/8˝ NPT plugs for duplicate pressure taps, two 1/8˝ pipe thread to rubber tubing adapter, and three flush mounting adapters with screws. (Mounting and snap ring retainer substituted for three adapters in MP & HP gage accessories.) Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II). Note: -SP models not RoHS approved. Note: For applications with high cycle rate within gage total pressure rating, next higher rating is recommended. See Medium and High pressure options. *Low temperature models available as special options. 20 DWYER INSTRUMENTS, INC. | dwyer-inst.com A-432 A-605 uOver Protection Note: See page 21 (Series 2000)

® HIGH ACCURACY MAGNEHELIC® DIFFERENTIAL PRESSURE GAGE YEAR LIMITED WARRANTY Twice as accurate as the standard Magnehelic® gage Mirrored scale overlay eliminates parallax error OPTIONS - HIGH ACCURACY MAGNEHELIC® GAGE To order add suffix: Description -HA High Accuracy Magnehelic® Gage. Accuracy within 1% and weatherproof. Also includes mirrored scale overlay and a six point calibration certificate Corrosion resistant brushed 304 stainless steel bezel Accuracy Specifications: See page 20 (Series 2000) V I DEO O N L I N E IP67 weatherproof housing -SS Optional brushed SS bezel 6-point calibration certificate included E R U S S E R P s e g a G e r u s s e r P l a i t n e r e f f i D ADDITIONAL GAGE OPTIONS LED set point indicator Adjustable signal flag Transparent overlay Mirrored scale overlay OPTIONS - OTHER OPTIONAL BEZELS To order add suffix: Description -CB Chrome bezel option: A chrome plated aluminum bezel for an aesthetically pleasing finish when mounting on metal surfaces such as control panels. Stainless steel bezel option: 304 stainless steel electro polished Ra 16 finished bezel. Corrosion resistant brushed 304 stainless steel bezel -SB -SS OPTIONS - LED SET POINT INDICATOR To order add suffix: Description -SP Bright red LED on right scale shows when set point is reached. Field adjustable from gage face, unit operates on 12-24 VDC. Set point indicator option comes with medium pressure (MP) bezel. Note: 4-13/16˝ hole for flush mounting. OPTIONS - ADJUSTABLE SIGNAL FLAG To order add suffix: Description -ASF Integral with plastic gage cover. Available for most models except those with medium or high pressure construction. Can be ordered with gage or separate. OPTIONS - TRANSPARENT OVERLAYS To order add suffix: Description -G -R -Y OPTIONS - MIRRORED SCALE OVERLAY To order add suffix: Description -M Green (to highlight and emphasize critical pressures) Red (to highlight and emphasize critical pressures) Yellow (to highlight and emphasize critical pressures) A mirrored scale overlay is also available to assist in reducing parallax error. Integrated mounting plate OPTIONS - INTEGRATED MOUNTING PLATE To order add suffix: Description -AHU1 -AHU2 Furnished with attached surface mounting plate Furnished with attached surface mounting plate and including A-481 installer kit (2 plastic static pressure tips and 7´of PVC tubing) OPTIONS - FOR HIGH STATE PRESSURE APPLICATIONS To order add suffix: Description -HP -MP High pressure option: for pressures to 80 psig Medium pressure option: for pressures to 35 psig OPTIONS To order add suffix: Description -FC -LT -NIST Factory calibration certificate Low temperatures to -20°F (-28°C) NIST traceable calibration certificate 22 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s e g a G e r u s s e r P l a i t n e r e f f i D ® SERIES AT22000 ATEX/IECEX APPROVED SERIES 2000 MAGNEHELIC® DIFFERENTIAL PRESSURE GAGE Magnehelic® Gage in Flame-Proof ATEX/IECEx Enclosure 1-31/32 [50.00] 19/32 [15.00] 6-19/64 [160.00] 5-9/32 [134.00] 7-7/8 [200.00] 6-19/64 [160.00] 5-23/64 [136.00] 1-37/64 [40.00] 8-5/64 [205.00] 7-11/64 [182.00] Ø5/16 [Ø8.00] 15/16 [24.00] 1/8˝ NPT 2-9/16 [65.00] 19/32 [15.00] 1/8˝ NPT The Series AT22000 ATEX/IECEx Approved Series 2000 Magnehelic® Differential Pressure Gage combines the popular Magnehelic® line with a flameproof enclosure to extend usage to hazardous locations. This gage can indicate positive, negative or differential pressures and is accurate within 2%. FEATURES/BENEFITS • ATEX/IECEx housing provides all the capabilities and value of the Magnehelic® in a flame & explosion proof enclosure • Quick response to pressure changes means no delay in assessing critical situations • Durable and rugged housing and high-quality components combined provides long- service life and minimized down-time • High impact strength and high temperature rated for applications where hazardous environments exist APPLICATIONS • Fan and blower pressures • Filter resistance • Air velocity • Furnace draft • Liquid levels with bubbler systems • Pressure in fluid amplifier or fluidic systems Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area. SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Magnehelic® Housing: Die cast aluminum case & bezel with acrylic cover; Exterior finish is coated gray to withstand 168 hour salt spray corrosion test. Housing Material: Aluminum. Finishing: Texture epoxy coat RAL7038. Accuracy: ±2% of FS (±3% on -0, -100PA, -125PA, -10MM and ±4% on -00, -60PA, -6MM ranges), throughout range at 70°F (21.1°C). Pressure Limits: -20 in Hg to 15 psig (-0.677 bar to 1.034 bar); MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar). Overpressure: Relief plug opens at approximately 25 psig (1.72 bar), standard gages only.u Temperature Limits: 20 to 140°F (-6.67 to 60°C); Low temperature option: -20°F (-28.8°C) (Note: Product temperature limits are less than case limits). Mounting Orientation: Diaphragm in vertical position. Enclosure Rating: IP66. IP65 with option OPV, overpressure relief valve. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Weight: 8.6 lb (3.9 kg). ATEX Certificate: BVI 14ATEX0072. II 2G Ex d IIC T6 Gb / II 2D Ex Agency Approvals: ATEX Compliant tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. 1370 RANGE CHART Model 2000-00N 2000-00 2000-0 2001 2002 2003 2004 2005 2006 2008 2010 2012 2015 2020 2025 2030 0 to 6.0 0 to 8.0 0 to 10 0 to 12 0 to 15 0 to 20 0 to 25 0 to 30 Range in w.c. Model Range in w.c. Model Range in w.c. .05 to 0 to .2 0 to .25 0 to .50 0 to 1.0 0 to 2.0 0 to 3.0 0 to 4.0 0 to 5.0 0 to 40 0 to 50 0 to 60 0 to 80 0 to 100 0 to 120 0 to 150 0 to 160 2040 2050 2060 2080 2100 2120 2150 2160 AT2 2001 -X AT2 2XXX X MP HP MODEL CHART Example Housing Range Pressure Rating Temperature Rating Housing Material Cover Process Connection Overpressure Plug X -A O 1 X T2 AT22001-XX-AO1XT2 ATEX/IECEx approved Series 2000 Magnehelic® differential pressure gage Specify range by using Magnehelic® model number. See range chart. Standard from -20 in Hg to 15 psig static pressure Medium pressure-max. static 35 psig High pressure-max. static 80 psig Standard temperature limits -6.67 to 60°C Low temperature limit to -28.8°C Aluminum Glass cover 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports X LT A O 1 2 X OPV Tag For other engineering unit ranges contact the factory. T2 SS information label 24 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov uOver Protection Note: See page 21 (Series 2000)

E R U S S E R P s e g a G e r u s s e r P l a i t n e r e f f i D ® SERIES 2-5000 MINIHELIC® II DIFFERENTIAL PRESSURE GAGE Combining High Accuracy, Compactness, Dependability, and Low Cost Ø2-19/32 [65.88] Ø3-1/16 [77.79] 1 [25.40] 1-7/16 [36.51] 9/32 [7.14] 2-21/64 [59.18] SURFACE MOUNT HOLES 2-3/8 [60.33] LOW PRESSURE PORT Ø7/16 [11.11] HOLE IN PANEL FOR SURFACE MOUNT (2) Ø5/32 HOLES IN PANEL FOR SURFACE MOUNT HIGH PRESSURE PORT Ø7/16 [11.11] HOLE IN PANEL FOR SURFACE MOUNT V I DEO O N L I N E Combining clean design, small size and low cost with enough accuracy for all but the most demanding applications our Series 2-5000 Minihelic® II Differential Pressure Gage offers the latest in design features for a dial type differential pressure gage. It is our most compact gage but is easy to read and can safely operate at total pressures up to 30 psig. FEATURES/BENEFITS • Removable lens and rear-housing provides easy, cost-effective servicing • Accuracy and value provides an excellent solution for OEM and user applications • Durable housing materials make it well-suited for rough environments and total high pressure APPLICATIONS • Room positive pressure sensing • Cabinet air-purging • Medical respiratory equipment • Air samplers • Electronic air cooling systems • Laminar flow hoods • Local indication on filter status • Face velocity on fume hood • Duct pressures SPECIFICATIONS Service: Air and compatible gases. Wetted Materials: Consult factory. Housing: Glass filled nylon; polycarbonate lens. Accuracy: ±5% of FS at 70°F (21.1°C). Pressure Limits: 30 psig (2.067 bar) continuous to either pressure connection. Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Size: 2-1/16˝ (52.39 mm) diameter dial face. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Process Connections: Barbed, for 3/16˝ ID tubing (standard); 1/8˝ male NPT (optional). Weight: 6 oz (170.1 g). Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II). Caution: For use only with air or compatible non-corrosive gases. 26 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES MARK II MARK II MOLDED PLASTIC MANOMETERS 3% Accuracy For Stationary And Portable Applications E R U S S E R P Mark II Model No. 25 inclined-vertical manometer. (shown with optional A-612 portable stand) 1-1/4 [31.75] 1-7/16 [35.53] 5/8 [15.88] 3-11/16 [93.66] Ø7/32 [5.56] HOLE 4-25/32 [121.44] 25/32 [19.84] 5-29/32 [150.02] 4-23/32 [119.86] 1-1/8 [28.58] 2-1/4 [57.15] MAX 25/32 [19.84] 7-13/32 [188.12] 7/32 X 13/32 [5.56 X 10.32] MOUNTING SLOT Ø15/64 [5.95] MOUNTING HOLE 5-5/16 [134.95] MAX 4-5/8 [117.48] 2-31/32 [75.41] Mark II Model No. 40-1 inclined manometer 15/64 [5.95] x 13/32 [10.32] MOUNTING SLOT 10-5/8 [269.88] 25/32 [19.84] 2-1/4 [57.15] MAX 1-1/4 [31.75] 4 [101.60] y r a n o i t a t S , s r e t e m o n a M Series Mark II Molded Plastic Manometers are of the inclined and inclined-vertical types. The curved inclined-vertical tube of the Model 25 gage provides higher ranges with more easily read increments at low readings. The Model 25 is excellent for general purpose work. The Model 40 inclined gage provides linear calibration and excellent resolution throughout its range. The Model 40 is ideally suited for air velocity and air filter gage applications. Both gage types are capable of pressure measurements above and below atmospheric as well as differential pressure measurements. Included with each Mark II manometer are two tubing connectors for 1/8˝ pipe or sheet metal ducts, two mounting screws, 1 ounce bottle of indicating fluid, red and green pointer flags and complete instructions. The Model 25 also includes 8´ of flexible double column plastic tubing. Portable operation of the Model 25 is made possible by the use of the optional A-612 portable stand. A short piece of tubing can be slipped over the Model 25 pressure connections to contain the gage fluid in transit. The Model 40 contains two 4-1/2´ lengths of clear plastic tubing, a plastic swing-out stand and leveling screw for portable operation. It also features convenient rapid shutoff pressure connections and integral overpressure safety traps. SPECIFICATIONS INCLINED/VERTICAL Accuracy: ±3% FS. Temperature Limits: 140°F (60°C). Pressure Limits: 10 psi (70 kPa). Weight: 1.04 lb (472 g). Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II). INCLINED Accuracy: ±3% FS. Temperature Limits: 150°F (65°C). Pressure Limits: 15 psi (100 kPa). Scale Length: Approx. 8-1/4˝ (21 cm). Weight: 1.23 lb (558 g). Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II). FEATURES/BENEFITS • Broad ranging in easy to read calibrated increments • Gages ideally suited for general measurements and specific air applications • Compact, stationary or portable device, make it a simple to use tool for pressure measurement in OEM or user applications APPLICATIONS • Paint booths • Air velocity measurement • Air filter gage OEM SPECIALS All Dwyer® Mark II molded plastic manometers can be supplied in OEM quantities with your name or special graphics and scales. ACCESSORIES Model Description A-612 A-606 A-480 A-489 Portable stand Air filter kit Plastic static pressure tip 4˝ straight static pressure tip with flange 28 DWYER INSTRUMENTS, INC. | dwyer-inst.com MODEL CHART Model Mark II 25 Mark II 26 Mark II 27* Mark II MM-80 Mark II M-700PA Mark II 40-1 Mark II 40-25MM Mark II 40-250PA Mark II 41-60MM Mark II 41-600PA *Require Pitot tube at additional cost.u Range 0-3 in w.c 0-7 in w.c. 0-7000 fpm 0-80 mm w.c. 10-0-700 Pa .1-0-1.0 in w.c. 0-26 mm w.c. 10-0-250 Pa 0-60 mm w.c. 20-0-600 Pa Fluid Used Red fluid, .826 s.g. Blue oil, 1.91 s.g. Red fluid, .826 s.g. Red fluid, .826 s.g. Red fluid, .826 s.g. Red fluid, .826 s.g. Red fluid, .826 s.g. Red fluid, .826 s.g. Blue oil, 1.91 s.g. Blue oil, 1.91 s.g. uPitot tube: See pages 186-188 (Test & Data section) Process Tubing Options: See page 455 (Gage Tubing Accessories)

® SERIES 420 DURABLOCK® INCLINED-VERTICAL MANOMETERS Accuracy To ±0.25% 37/64 DIA. MTG. HOLE B C D A G Inclined-vertical manometer Inclined-vertical manometer single column double column 1˝ X 1/4˝ MTG. SLOTS F E RANGES AND DIMENSIONS - SUITABLE FOR TOTAL PRESSURE UP TO 100 PSIG, TEMPERATURES UP TO 150°F Model Description 424-10 421-5 421-10 422-5 422-10 *Single column metric-ranges and divisions in millimeters. Single column Single column Single column Double column Double column Inclined Range Inches of Water 0-2.0 0-1.0 0-1.0 0-1.0 0-1.0 Inclined Minor Div. .01 .01 .01 .01 .01 Length of Inclined Scale 20˝ 6-1/2˝ 6-1/2˝ 6-1/2˝ 6-1/2˝ Vertical Range Inches of Water 2.1-10 1.1- 5 1.1-10 1.1-5 1.1-10 Vertical Minor Div. .10 .10 .10 .10 .10 Length of Vertical Scale 9˝ 4-5/8˝ 10-1/8˝ 4-5/8˝ 10-1/8˝ Dimensions A 16-1/2˝ 9-7/8˝ 15-1/2˝ 10-1/2˝ 16-1/8˝ B 25-1/4˝ 9-5/8˝ 9-5/8˝ 11-1/2˝ 11-1/2˝ C 12-5/8˝ 4-7/8˝ 4-7/8˝ 5-1/8˝ 5-1/8˝ D 1˝ 5/8˝ 5/8˝ 5/8˝ 5/8˝ E 10-1/2˝ 6-1/2˝ 6-1/2˝ 6-1/2˝ 6-1/2˝ F 5-3/8˝ 3-1/4˝ 3-1/4˝ 3-1/4˝ 3-1/4˝ G 16˝ 9-7/8˝ 15-1/2˝ 10-1/2˝ 16-1/8˝ Weight lb-oz 22-12 4-12 6-10 6-10 10-13 Dwyer® Series 420 Durablock® Inclined-Vertical Manometers are extremely accurate instruments designed and made especially for precision measurement of low differential pressures in laboratory and test applications. The inclined range bore has a length of 20˝ to provide ample multiplication of indicating fluid movement in this critical lower part of the range. FEATURES/BENEFITS • High-accuracy measurement of low range gas and air pressure suitable for laboratory and test applications • Long bore length provides ample room for fluid movement for low range sensing • Precision built to assure device meets the highest standards APPLICATIONS • Low pressure laboratory and test applications SERIES 1230 & 1235 FLEX-TUBE® WELL-TYPE MANOMETERS ACCESSORIES - STANDARD Description Include two 1 oz bottles of .826 red gage fluid (1.91 blue gage oil for models 421-23 and 422-23), rapid shut-off type “a” connections, two 3 ft lengths of clear plastic tubing and two 1/8˝ NPT tubing adapters — two sets for double column models. E R U S S E R P y r a n o i t a t S , s r e t e m o n a M A 2-3/4 [69.85] 2-1/2 [63.50] Ø3/16 [4.76] MOUNTING HOLES TYP 2 PLACES 3-9/16 [90.49] A 1-3/8 [34.93] TYP 1-1/2 [38.10] 2-3/4 [69.85] 3/4 [19.05] Series 1235 panel mounting Series 1230 wall mounting Scale in Inches of Water or Mercury 0-8 0-12 0-16 0-20 0-36 Dimensions A W/M 15-13/16 19-3/8 23-1/2 27-9/16 43-1/8 D 16-3/4 21-7/8 27 32-1/8 51-1/4 Mercury Required to Fill (Wt.) 12 oz 14 oz 16 oz 18 oz 26 oz Model 1230-8 1230-12 1230-16 1230-20 1230-36 Scale in Inches of Water or Mercury Model 1235-20 0-20 Dimensions A W/M 29-5/16 Mercury Required to Fill (Wt.) D 33-9/16 18 oz Dwyer® Series 1230 & 1235 Flex-Tube® Well Type Manometers are designed to meet the need for a direct reading single column instrument providing highly accurate pressure readings; positive, negative or differential. Unlike other makes, Dwyer manometers have no hidden wells or packing glands. These instruments are constructed of shatter-proof clear plastic tubing permanently bonded to well assemblies with leak-proof glued joints. Well assemblies are precisely machined from solid acrylic plastic. Over-pressure safety traps assure protection against loss of fluid. Scales are adjusted with quick-acting positive mechanism. These manometers are rated to 100 psig (6.89 bar). Not recommended for vacuum service beyond 5˝ Hg (68 in w.c.). FEATURES/BENEFITS • High-accuracy pressure measurement suitable for laboratory or general industry • Precision built assures device meets the highest standards • No moving parts mean no calibration or nothing to wear out • Over-pressure trap prevents liquid from being expelled from gage, preventing disruption of operation APPLICATIONS • Laboratory and industrial service applications 30 DWYER INSTRUMENTS, INC. | dwyer-inst.com OPTIONS To order add suffix: Description -NIST Example: 1222-8-W/M-NIST NIST traceable calibration certificate MODEL CHART Model 1230-8-W/M 1230-12-W/M 1230-16-W/M 1230-20-W/M 1230-36-W/M 1235-20-W/M Note: Water/mercury models. For 0.826 S.P. gage fluid models change -W/M to a -D. ACCESSORIES - STANDARD Description Include one set of type “a” connections, .826 sp. gr. red gage fluid for “D” style or fluorescein green dye concentrate with wetting agent for “W/M” styles, two 3 ft lengths of clear vinyl tubing and two 1/8˝ NPT tubing adapters.

® SERIES PTGD DIFFERENTIAL PRESSURE PISTON-TYPE GAGES Excellent Accuracy and Over-Pressure Ratings E R U S S E R P Shown with optional pointer follower 2.5˝ 1-31/32 [50.00] 2X 1/4˝ UNC 1/2 [12.60] 1 [25.20] 1-9/32 [32.20] 1-4 [6.50] 3-3/32 [83.00] 3 [76.20] 7/8 [22.00] 1-7/8 [47.60] 1-31/32 [50.00] 7-9/32 [32.20] 1/2 [12.60] 1 [25.20] 6-7/32 [157.93] 5-1/4 [133.30] HIGH 1-3/32 [28.10] 2-1/8 [54.00] HIGH LOW 4X ø3/16 [ø5.16] EQUALLY SPACED ON A ø3-1/2 [ø88.90] BOLT CIRCLE 1/4˝ NPT BOTH ENDS ≠≠ø3-1/32 [ø76.99] PANEL CUTOUT LOW 4X ø3/16 [ø5.16] EQUALLY SPACED ON A ø5-5/8 [ø142.85] BOLT CIRCLE 1/4˝ NPT BOTH ENDS ø5-9/32 [ø133.97] PANEL CUTOUT 1-13/16 [46.00] 3[76.00] 3-31/32 [101.00] 1-13/16 [46.00] 3 [76.00] 3-31/32 [101.00] 4.5˝ The Series PTGD Differential Pressure Piston-Type Gages can be used to measure the pressure drop across filters, strainers, pump performance testing, and heat exchanger pressure drop monitoring. Its simple, rugged design possesses weather and corrosion resistant gage front with a shatter resistant lens. The Series PTGD contains a piston-sensing element which provides different differential pressure ranges with full-scale accuracies of ±2%. Constructed with aluminum or 316 SS and available with two 1/4˝ female NPT end connections, the Series PTGD provides over- range protection rated to 3000 psig (200 bar) or 6000 psig (400 bar) depending on model. Standard models come with in-line connections. Back or bottom connections are also available. FEATURES/BENEFITS • Rugged, weather and corrosion proof design supports use in harsh environments • Over-protection range depending on model, up to 6000 psig (400 bar) allows high- pressure applications • Flexibility of connection selection fits the most sophisticated designs SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Gage body: Aluminum or 316 SS; Piston: Aluminum or 316 SS; Spring: 302 SS; Seals: Buna-N (standard); PTFE, Ceramic magnet; Dial case: Nylon 6 30% glass filled gage case. Window: Acrylic. Accuracy: ±2% FS. Temperature Limit: 176°F (80°C). Pressure Limits: 3000 psi (206 bar) for aluminum body; 6000 psi (413 bar) for SS body. Size: 2.5˝ (63 mm) or 4.5˝ (115 mm). Mounting Orientation: Mount in any position. Process Connections: 1/4˝ female NPT end connections standard; 1/4˝ female NPT back or bottom connections available. All styles available with 1/4˝ BSP. Weight: Aluminum: 2.5˝ 0.88 lb (399 g); 4.5˝ 1.35 lb (612 g); Stainless steel: 2.5˝ 1.75 lb (794 g); 4.5˝ 2.3 lb (1.04 kg). s e g a G e r u s s e r P l a i t n e r e f f i D APPLICATIONS • Filter pressure drop • Strainers • Pump performance testing • Heat exchanger pressure drop OPTIONS To order add suffix: Description -V -N -PY -PF -RP -SP1 -SP2 Use order code: NISTCAL-PG1 FKM fluoroelastomer seals EPDM seals Glycerine fill Pointer follower Reverse port 1 0.5A SPDT DIN plug 2 0.25A SPDT DIN plugs Description NIST traceable calibration certificate 32 DWYER INSTRUMENTS, INC. | dwyer-inst.com Description 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ aluminum 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel 2.5˝ stainless steel MODEL CHART Range Model 0-5 psid (0.25 bar) PTGD-AA01A 0-10 psid (0.75 bar) PTGD-AA02A 0-15 psid (1 bar) PTGD-AA03A 0-20 psid (1.6 bar) PTGD-AA04A 0-25 psid (1.6 bar) PTGD-AA05A 0-30 psid (2 bar) PTGD-AA06A 0-40 psid (3 bar) PTGD-AA07A 0-50 psid (3.5 bar) PTGD-AA08A 0-60 psid (4 bar) PTGD-AA09A 0-80 psid (5.5 bar) PTGD-AA10A 0-100 psid (7 bar) PTGD-AA11A 0-150 psid (10 bar) PTGD-AA12A 0-5 psid (0.25 bar) PTGD-SA01A 0-10 psid (0.75 bar) PTGD-SA02A 0-15 psid (1 bar) PTGD-SA03A 0-20 psid (1.6 bar) PTGD-SA04A 0-25 psid (1.6 bar) PTGD-SA05A 0-30 psid (2 bar) PTGD-SA06A 0-40 psid (3 bar) PTGD-SA07A 0-50 psid (3.5 bar) PTGD-SA08A 0-60 psid (4 bar) PTGD-SA09A 0-80 psid (5.5 bar) PTGD-SA10A 0-100 psid (7 bar) PTGD-SA11A 0-150 psid (10 bar) PTGD-SA12A Note: For 4.5˝ dial face, change -AA to -AC for aluminum and -SA to -SC for stainless steel. For back or bottom connections as well as female BSP threads, contact the factory.

® SERIES DHII DIGIHELIC® II DIFFERENTIAL PRESSURE CONTROLLER NEMA 4 (IP66) Housing With Large, Bright LCD, Square Root Output for Flow E R U S S E R P 1-31/64 [37.62] 4-23/32 [120] 1-1/2 [38.35] 3-7/16 [87.12] 1-1/16 [26.97] 1-7/8 [47.5] 4-23/32 [120] 1-45/64 [43.18] 2-23/64 [59.94] 1-5/16 [33] 45/64 [17.78] 1-17/32 [38.61] 1-45/64 [43.18] 4X Ø3/16 [4.76] CLEARANCE HOLES FOR MOUNTING MOUNTING HOLE PATTERN 4-1/8 [105] 3-17/64 [83] The Series DHII Digihelic® II Differential Pressure Controller takes all the features of the standard Digihelic® Pressure Controller and packages them in a robust NEMA 4 (IP66) housing. The Digihelic® II Pressure Controller combines the 2 SPDT control relays, 4 to 20 mA process output and Modbus® communications with a large, brightly backlit 4 digit LCD display that can easily be seen from long distances. The electrical wiring has also been enhanced in the DHII with its detachable terminal blocks. The removable terminals allow the install to easily wire the terminal block outside the housing and then attach to the circuit board, reducing wiring difficulties and installation time on the process. The Digihelic® II Differential Pressure Control in the NEMA 4 (IP66) enclosure enables this product to be the perfect choice when mounting pressure controls outdoors in such applications as rooftop air handlers. This housing also makes it the ideal solution for surface mounting in clean rooms or facilities where water or a cleaning solution is utilized in maintaining plant cleanliness. FEATURES/BENEFITS • NEMA 4 housing enables a range of uses both outdoors or indoors where water is present • Large backlight LCD display provides local reading from a distance • Detachable terminal blocks reduce wiring difficulties saving installation time s r e t t i m s n a r T , s e h c t i w S / s e g a G APPLICATIONS • Air handlers • Clean rooms ACCESSORIES Model MN-1 A-301 A-302 A-438 A-489 A-302F-A Digihelic Links™ Description Mini-Node™ USB/RS-485 converter Static pressure tip for 1/4˝ metal tubing connection Static pressure tip for 3/16˝ and 1/8˝ I.D. plastic or rubber tubing Surface mounting brackets 4˝ straight static pressure tip with flange 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting screws Communications software MODEL CHART - AVAILABLE PRESSURE ENGINEERING UNITS e r u s s e r P l a i t n e r e f f i D SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing Material: Aluminum, glass. Accuracy: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up). Stability: < ±1% per year. Pressure Limits: Ranges ≤ 2.5 in w.c. = 2 psi; 5˝: 5 psi; 10˝: 5 psi; 25˝: 5 psi; 50˝: 5 psi, 100˝: 9 psi. Temperature Limits: 32 to 140°F (0 to 60°C). Compensated Temperature Limits: 32 to 140°F (0 to 60°C). Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). Power Requirements: High voltage power = 100 to 240 VAC, 50 to 400 Hz or 132 to 240 VDC; Low voltage power = 24 VDC ±20%. Power Consumption: Low voltage power = 24 VDC - 130 mA max; High voltage power = 100 to 240 VAC, 132 to 240 VDC - 7 VA max. Output Signal: 4 to 20 mA DC into 900 Ω max. Zero & Span Adjustments: Accessible via menus. Response Time: 250 ms (dampening set to 1). Display: 4 digit backlit LCD 0.6˝ height. LED indicators for set point and alarm status. Electrical Connections: Euro type removable terminal blocks with watertight conduit fittings for 1/2˝ watertight conduit. Process Connections: 1/8˝ female NPT. Enclosure Rating: Designed to meet NEMA 4 (IP66). Mounting Orientation: Mount unit in horizontal plane. Weight: 2 lb 10 oz (1.19 kg). Serial Communications: Modbus® RTU, RS485, 9600 baud. Agency Approvals: CE, UL. SWITCH SPECIFICATIONS Switch Type: 2 SPDT relays. Electrical Rating: 8 amps at 240 VAC resistive. Set Point Adjustment: Adjustable via keypad on face. in w.c. .2500 1.000 5.000 10.00 25.00 50.00 100.0 ft w.c. - - .4167 .8333 2.083 4.167 8.333 mm w.c. 6.350 25.40 127.0 254.0 635.0 1270 2540 cm w.c. 0.635 2.540 12.70 25.40 63.50 127.0 254.0 mm Hg 0.467 1.868 9.342 18.68 46.71 93.42 186.8 Model DHII-002 DHII-004 DHII-006 DHII-007 DHII-008 DHII-009* DHII-010* *Velocity and volumetric flow not available on bi-directional range units and models DHII-009 & DHII-010. mbar Pa 0.623 2.491 12.45 24.91 62.27 124.5 249.1 hPa 0.623 2.491 12.45 24.91 62.27 124.5 249.1 kPa - 0.249 1.245 2.491 6.227 12.45 24.91 psi - - .1806 .3613 .9032 1.806 3.613 in Hg - - .3678 .7356 1.839 3.678 7.356 oz/in2 0.144 0.578 2.890 5.780 14.45 28.90 57.80 62.28 249.1 1245 2491 6227 - - OPTIONS Use order code: Description -NIST NIST calibration certificate 34 DWYER INSTRUMENTS, INC. | dwyer-inst.com MODEL CHART - BI-DIRECTIONAL* RANGES Model DHII-012 DHII-014 DHII-015 DHII-016 DHII-017 *Velocity and volumetric flow not available on bi-directional range units and models DHII-009 & DHII-010. Range 0.25 to 0 to 0.25 in w.c. 1.0 to 0 to 1.0 in w.c. 2.5 to 0 to 2.5 in w.c. 5 to 0 to 5 in w.c. 10 to 0 to 10 in w.c. Modbus® is a registered trademark of Schneider Automation, Inc. Process Tubing Options: See page 455 (Gage Tubing Accessories)

® SERIES DH3 DIGIHELIC® 3 DIFFERENTIAL PRESSURE CONTROLLERS Digihelic® Controller in Photohelic® Gage, Square Root Output for Flow E R U S S E R P 2-1/16 [52.39] 2 [50.80] [4] 6-32 HOLES EQUALLY SPACED ON A 5-1/8 [130.18] B.C. PANEL MOUNTING 1/2 [12.70] 1-9/32 [32.54] 11/16 [17.46] 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 30° 1/2 [12.70] 1-3/4 [44.45] 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1-1/4 [31.75] 1/8 FEMALE NPT LOW PRESSURE CONNECTION V I DEO O N L I N E Note: Shown with optional -SS bezel. Backward compatible+ with Magnehelic® gage. Ø5 [127.00] ø4-47/64 [120.25] 5/8 [15.88] PANEL MAX 2-1/2 [63.50] 3/16 [4.76] Ø4 [101.60] FACE 5-1/2 [139.70] O.D. MOUNTING RING 1/8 FEMALE NPT LOW PRESSURE CONNECTION 11/16 [17.46] [3] Ø3/16 [4.77] HOLES EQUALLY SPACED ON A 4-1/8 [104.78] B.C. SURFACE MOUNTING The Series DH3 Digihelic® 3 Differential Pressure Controllers are 3-in-1 instruments possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1% full-scale accuracy on ranges down to the extremely low 0.25 in w.c. to 2.5 in w.c. full-scale. Ranges of 5 in w.c. and greater maintain 0.5% FS accuracy. Bi-directional ranges are also available. The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4 to 20 mA process output. Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4 to 20 mA process output to fit your applications range and field calibration. FEATURES/BENEFITS • 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money • Full-scale accuracy of 1% even on extremely low ranges, and 0.5% for ranges above 5 in w.c. provide for greater measurement precision • Secure menu program provides access to device operation only for the right skill level • Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to DH3 pressure controller SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing Material: Die cast aluminum case and bezel. Accuracy: ±1.5% for 0.25 in and ±0.25 in w.c. ranges. Ranges 0.5 in to 5 in w.c. and corresponding bi-directional (except ±2.5 in w.c.) ±1%; All other ranges: ±0.5% @ 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up). Stability: < ±1% per year. Pressure Limits: Ranges ≤ 2.5 in w.c.: 25 psi; ±2.5˝, 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in w.c.: 9 psi. Temperature Limits: 32 to 140°F (0 to 60°C). Compensated Temperature Limits: 32 to 140°F (0 to 60°C). Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). For 0.25 in and ±0.25 in w.c. ranges: ±0.03%/°F (±0.054%/°C). Power Requirements: 12-28 VDC, 12- 28 VAC 50 to 400 Hz. Power Consumption: 3 VA max. Output Signal: 4 to 20 mA DC into 900 Ω max. Zero & Span Adjustments: Accessible via menus. Response Time: 250 ms (damping set to 1). Display: Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm status. Electrical Connections: 15 pin male high density D-sub connection. 18˝ (46 cm) cable with 10 conductors included. Process Connections: 1/8˝ female NPT. Side or back connections. Mounting Orientation: Mount unit in vertical plane. Size: 5˝ (127 mm) OD x 3-1/8˝ (79.38 mm); -SS bezel: 4-3/4˝ (120.7 mm) OD x 2-21/32 (67.5 mm). Weight: 1.75 lb (794 g). Agency Approvals: CE. SWITCH SPECIFICATIONS Switch Type: 2 SPDT relays. Electrical Rating: 1 A @ 30 VAC/VDC. Set Point Adjustment: Adjustable via keypad on face. e r u s s e r P l a i t n e r e f f i D s r e t t i m s n a r T , s e h c t i w S / s e g a G APPLICATIONS • SCFM duct flow • Filter status • Duct or building static pressure • Damper and fan control MODEL CHART Model DH3-002 DH3-003 DH3-004 DH3-005 DH3-006 DH3-007 DH3-009 Ranges 0 to 0.25 in w.c. 0 to 0.5 in w.c. 0 to 1 in w.c. 0 to 2.5 in w.c. 0 to 5 in w.c. 0 to 10 in w.c. 0 to 25 in w.c. Model *DH3-010 *DH3-011 *DH3-013 *DH3-014 *DH3-015 *DH3-016 *DH3-017 *DH3-018 Ranges 0 to 50 in w.c. 0 to 100 in w.c. 0 to ±0.25 in w.c. 0 to ±0.5 in w.c. 0 to ±1 in w.c. 0 to ±2.5 in w.c. 0 to ±5 in w.c. 0 to ±10 in w.c. *Velocity and volumetric flow not available on bi-directional range units and models DH3-010 and DH3-011. ACCESSORIES Model A-298 A-301 A-302 A-302F-A A-370 A-489 Description Flat aluminum bracket for flush mounting Static pressure tip for 1/4˝ metal tubing connection Static pressure tip for 3/16˝ and 1/8˝ I.D. plastic or rubber tubing 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting screws Mounting bracket flush mount bracket; bracket is then surface mounted; steel with gray hammertone epoxy finish 4˝ straight static pressure tip with flange OPTIONS To order add suffix: Description -SS 304 brushed stainless steel bezel. +Backward compatible with standard Magnehelic® gage installation diameter Example: DH3-004-SS -NIST Example: DH3-004-NIST -FC Example: DH3-004-FC NIST traceable calibration certificate Factory calibration certificate 36 DWYER INSTRUMENTS, INC. | dwyer-inst.com Process Tubing Options: See page 455 (Gage Tubing Accessories)

E R U S S E R P l e r u s s e r P l a i t n e r e f f i D i a D , s e h c t i w S / s e g a G ® SERIES A3000 PHOTOHELIC® PRESSURE SWITCH/GAGE 3-in-1 Indicating Gage, Lo-Limit and Hi-Limit Control 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1/8 FEMALE NPT LOW PRESSURE CONNECTION 2-1/2 [63.50] 2-1/16 [52.39] 2 [50.80] (4) 6-32 HOLES EQUALLY SPACED ON A 5-1/8 [130.18] B.C. 1-1/4 [31.75] Ø4-3/4 [120.65] 3-7/8 SQ [98.43] 3/4 CONDUIT CONNECTION 4-3/8 [111.13] HOUSING REMOVAL Ø4-47/64 [120.25] Ø5 [127.00] 3-7/8 [98.43] 5-1/8 [130.18] 6-3/8 [161.93] 7-5/8 [193.68] 5/8 [15.88] 5/8 [15.88] PANEL MAX 3/16 [4.76] Ø4 [101.60] FACE 5-1/2 [139.70] O.D. MOUNTING RING V I DEO O N L I N E Set points are instantly adjusted with front knobs The Series A3000 Photohelic® Pressure Switch/Gage functions as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full-scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full-scale pressure ranges from a low 0-.25 in (0-6 mm) w.c. up to 30 psi (21 bar). SPECIFICATIONS GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±2% of FS at 70°F (21.1°C). ±3% on -0 and ±4% on -00 models. Pressure Limits: -20˝ Hg to 25 psig (-0.677 to 1.72 bar); MP option: 35 psig (2.41 bar); HP option: 80 psig (5.52 bar). Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Low temperature option available. Process Connections: 1/8˝ female NPT. Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) OD x 8-1/4˝ (209.55 mm). Weight: 4 lb (1.81 kg). FEATURES/BENEFITS • 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money • Patented design and 1% full-scale dead band provides quick response to pressure changes means no delay in switching and chatter-free operation • A wide range of models that can meet pressure measurement specifications from low to very high APPLICATIONS • Air conditioning systems • Clean rooms • Fume exhaust systems SWITCH SPECIFICATIONS Switch Type: Each set point has 2 form C relays (DPDT). Repeatability: ±1% of FS. Electrical Rating: 10 A @ 28 VDC, 10 A @ 120, 240 VAC. Electrical Connections: Screw terminals. Use 167°F (75°C) copper conductors only. Power Requirements: 120 VAC, 50/60 Hz; 240 VAC and 24 VAC power optional. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Adjustable knobs on face. Agency Approvals: CE, CSA, UL. 38 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P l e r u s s e r P l a i t n e r e f f i D i a D , s e h c t i w S / s e g a G ® SERIES AT3A3000 ATEX/IECEX APPROVED PHOTOHELIC® SWITCH/GAGE WITH 120, 240 OR 24 VAC POWER Photohelic® Switch/Gages in Flame-Proof ATEX/IECEx Enclosures 1-31/32 [50.00] 9-29/64 [240.00] 7-7/8 [200.00] 6-27/32 [174.00] 7-7/8 [200.00] 1/8˝ NPT 1-1/32 [26.00] 2-9/16 [65.00] Ø25/64 [Ø10.00] 11-19/64 [287.00] 43/64 [17.00] 1/8˝ NPT 1-37/64 [40.00] 10-5/16 [262.00] 9-19/64 [236.00] Flame-proof approved Series AT3A3000 ATEX/IECEx Approved Photohelic® Switch/Gage with 120, 240 or 24 VAC Power functions as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 psig (2.4 bar) or 80 psig (5.5 bar). Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face (accessible opening case after de-energizing instrument). Set points can be interlocked to provide variable dead band– ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Flame-proof enclosures are available in aluminum with glass window which allows for viewing of set point needles and process pressure. FEATURES/BENEFITS • 3-in-1 ATEX/IECEx approved instrument allows the reduction of several instruments with one product, saving inventory, installation time and money • Flame-proof enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to process pressure and set point status APPLICATIONS • Hazardous area pressure measurement and switching • Air conditioning systems • Clean rooms • Fume exhaust systems Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area. SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing material: Aluminum. Finishing: Texture epoxy coat RAL7038. Accuracy: ±2% of FS at 70°F (21.1°C); ±3% on -0 and ±4% on -00 models. Pressure Limits: -20 in Hg to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar). Temperature Limits: 20 to 120°F (-6.67 to 48.9°C) LT low temperature option to -20°F available (Note: Product temperature limits differ from case). Dial Size: 4˝ (101.6 mm). Mounting Orientation: Diaphragm in vertical position. Set Point Adjustment: Adjustable knobs on Photohelic® gage face behind enclosure cover. Follow instructions and safety warnings to open cover. SWITCH SPECIFICATIONS Switch Type: Each set point has 2 Form C relays (DPDT). Repeatability: ±1% of FS. Electrical Rating: 10 A @ 28 VDC, 10 A @ 120, 240 VAC. Electrical Wiring: Screw terminals. Power Requirements: 120 VAC, 50/60 Hz; 240 VAC & 24 VAC power optional. Enclosure Rating: IP66. IP65 with option OPV, overpressure relief valve. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Electrical Connections: Three 1/2˝ NPT female. Cable gland not included. Weight: 28.4 lb (12.9 kg). ATEX Certificate: BVI 14ATEX0072. Agency Approvals: ATEX Compliant tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. II 2G Ex d IIC T6 Gb / II 2D Ex 1370 RANGE CHART Model A3000-00 A3000-0 A3001 A3002 A3003 A3004 A3005 A3040 A3050 A3060 A3080 A3100 A3150 Range in w.c. Model Range in w.c. Model Range in w.c. 0 to .25 0 to .50 0 to 1.0 0 to 2.0 0 to 3.0 0 to 4.0 0 to 5.0 0 to 6.0 0 to 8.0 0 to 10 0 to 15 0 to 20 0 to 25 0 to 30 0 to 40 0 to 50 0 to 60 0 to 80 0 to 100 0 to 150 A3006 A3008 A3010 A3015 A3020 A3025 A3030 MODEL CHART Example Housing Range Power Pressure Rating Construction Temperature Rating Housing Material Cover Process Connection Overpressure Plug Tag AT3 A3001 -120VAC -X X X -A B 1 X AT3 A3XXX 120VAC 240VAC 24VAC X MP HP X X LT A B O 1 2 X OPV T2 AT3A3001-120VAC-XXX-AB1XT2 ATEX/IECEx approved Photohelic® switch/gages Specify range by wiring Photohelic® model number. See range chart. Power requirement 120 VAC Power requirement 240 VAC Power requirement 24 VAC Standard -25 in Hg to 25 psig Medium pressure max. static 35 psig High pressure max. static 80 psig Standard silicone construction Standard temperature 20 to 120°F Low temperature to -20°F Aluminum Blind Glass cover 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports T2 SS information label 40 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

® SERIES 3000MR & 3000MRS PHOTOHELIC® SWITCH/GAGES Combines Differential Pressure Gage with Low/High Set-Points, Compact Size 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1-1/4 [31.75] 1/8 FEMALE NPT LOW PRESSURE CONNECTION Note: Shown with optional -SS bezel. Backward compatible+ with Magnehelic® gage. 2-1/16 [52.39] 2 [50.80] [4] 6-32 HOLES EQUALLY SPACED ON A 5-1/8 [130.18] B.C. ø4-47/64 [120.25] ø5 [127.00] ® 5/8 [15.88] 5/8 [15.88] PANEL MAX 2-1/2 [63.50] 3/16 [4.76] ø4 [101.60] FACE 5-1/2 [139.70] O.D. MOUNTING RING V I DEO O N L I N E Using solid state technology, the Series 3000MR & 3000MRS Photohelic® Switch/ Gages combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage employing the durable, time-proven Magnehelic® gage design. Switch setting is easy to adjust with large external knobs on the gage face. Gage reading is unaffected by switch operation - will indicate accurately even if power is interrupted. Solid state design now results in greatly reduced size and weight. Units can be flush mounted or surface mounted with hardware supplied. 3000MR models employ versatile electromechanical relays with gold over silver contacts - ideal for dry circuits. For applications requiring high cycle rates, choose 3000MRS models with SPST (N.O.) solid state relays. All models provide both low and high limit control and include 18-inch (45 cm) cable assemblies for electrical connections. Compatible with air and other non-combustible, non-corrosive gases, they can be used in systems with pressures to 25 psig (1.725 bar). Optional construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar). FEATURES/BENEFITS • Gage reading unaffected by switch operation and will continue to read pressure even during power loss • Zero and range adjustments outside of gage means no disassembly in normal service • Solid-state design allows for switching in high cycle rate applications without degradation • Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to Photohelic® switch/gage APPLICATIONS • Pneumatic conveying • Air conditioning systems • Clean rooms MODEL CHART SPECIFICATIONS GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±2% of FS (3000-0 ±3% of FS). (3000-00 ±4% of FS). Pressure Limit: -20˝ Hg. to 25 psig (-0.677 bar to 1.72 bar). MP option: 35 psig (2.41 bar), HP option: 80 psig (5.52 bar). Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Process Connections: 1/8˝ female NPT (duplicated side and back). Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) OD x 3-1/8˝ (79.38 mm); -SS bezel: 4-3/4˝ (120.7 mm) OD x 2-21/32 (67.5 mm). Weight: 1.8 Ib (816 g). SWITCH SPECIFICATIONS 3000MR Switch Type: Each set point has 1 form C relays (SPDT). Relay Contacts: (Resistive load) 1 form C rated 1.0A @ 30 VDC, 0.3A @ 110 VDC or 0.5A @ 125 VAC. Gold over clad silver - suitable for dry circuits. Electrical Connections: 18˝ (46 cm) cable assembly with 8 conductors. Optional lengths to 100´ (30.5 m). Power Requirements: 24 VDC, regulated ±10%. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Adjustable knobs on face. Agency Approvals: CE. SWITCH SPECIFICATIONS 3000MRS Switch Type: Each set point has a solid state relay. Switching Voltage: 20-280 VAC (47-63 Hz). Switching Current: 1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST NO. Electrical Connections: 18˝ (46 cm) cable assembly with 6 conductors, optional lengths to 100´ (30.5 m). Power Requirements: 24 VDC, regulated ±10%. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Adjustable knobs on face. Agency Approvals: CE. E R U S S E R P l e r u s s e r P l a i t n e r e f f i D i a D , s e h c t i w S / s e g a G ACCESSORIES Model Description A-298 A-370 Flat aluminum bracket for flush mounting 3000MR/MRS Mounting bracket flush mount 3000MR/MRS bracket. Bracket is then surface mounted. Steel with gray hammertone epoxy finish R/C snubber recommended for inductive loads like a solenoid or contactor A-600 ACCESSORIES - STANDARD Description Mounting ring, snap ring, 18˝ (45 cm) cable assembly, (2) 3/16˝ tubing to 1/8˝ NPT adapters, (2) 1/8˝ NPT pipe plugs, (4) 6-32 x 1-1/4˝ RH machine screws (panel mounting), (3) 6-32 x 5/16˝ RH machine screws (surface mounting) OPTIONS To order add suffix: Description -SS 304 brushed stainless steel bezel. +Backward compatible with standard Magnehelic® gage installation diameter Example: 3001MR-SS -TAMP -LT -MP -HP -WP -NIST Example: 3001MR-NIST Tamper-proof knobs; require spanner key (supplied) to change set points Low temperature option; for use under 20°F (-6.7°C) Medium pressure; increases maximum rated pressure to 35 psig (2.41 bar) High pressure; increases maximum rated pressure to 80 psig (5.5 bar) Weatherproof housing option NIST traceable calibration certificate Process Tubing Options: See page 455 (Gage Tubing Accessories) Model 3000MR-00 3000MR-0 3001MR 3002MR 3003MR 3005MR 3010MR 3015MR 3020MR 3030MR 3050MR 3100MR Model 3000MR-60PA** 3000MR-125PA* 3000MR-250PA 3000MR-500PA Model 3000MR-1KPA 3000MR-3KPA 3000MR-4KPA Model 3000MR-6MM** 3000MR-10MM* 3000MR-25MM 3000MR-50MM 3000MR-100MM Range, in w.c. 0-0.25 0-0.5 0-1.0 0-2.0 0-3.0 0-5.0 0-10 0-15 0-20 0-30 0-50 0-100 Range, Pascals 0-60 0-125 0-250 0-500 Range, kPa 0-1.0 0-3.0 0-4.0 Range, mm w.c. 0-6 0-10 0-25 0-50 0-100 Range, cm w.c. Minor Divs. Model .005 .01 .02 .05 .10 .10 .20 .50 .50 1.0 1.0 2.0 Minor Divs. Model 2.0 5.0 5.0 10.0 Minor Divs. Model .02 .10 .10 Minor Divs. Model .20 .50 .50 1.0 2.0 Minor Divs. Model .50 3000MRS-00** 3000MRS-0* 3001MRS 3002MRS 3003MRS 3005MRS 3010MRS 3015MRS 3020MRS 3030MRS 3050MRS 3100MRS 3000MRS-60PA** 3000MRS-125PA* 3000MRS-250PA 3000MRS-500PA 3000MRS-1KPA 3000MRS-3KPA 3000MRS-4KPA 3000MRS-6MM** 3000MRS-10MM* 3000MRS-25MM 3000MRS-50MM 3000MRS-100MM Range, in w.c. 0-0.25 0-0.5 0-1.0 0-2.0 0-3.0 0-5.0 0-10 0-15 0-20 0-30 0-50 0-100 Range, Pascals 0-60 0-125 0-250 0-500 Range, kPa 0-1.0 0-3.0 0-4.0 Range, mm w.c. 0-6 0-10 0-25 0-50 0-100 Range, cm w.c. Minor Divs. .005 .01 .02 .05 .10 .10 .20 .50 .50 1.0 1.0 2.0 Minor Divs. 2.0 5.0 5.0 10.0 Minor Divs. .02 .10 .10 Minor Divs. .20 .50 .50 1.0 2.0 Minor Divs. .50 Model 3000MR-20CM 0-20 *±3% of full-scale. **± 4% of full-scale. Note: To order, select either MR or MRS suffix to Series 3000 number. Examples: 3001MR or 3001MRS 3000MRS-20CM 0-20 42 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P l e r u s s e r P l a i t n e r e f f i D i a D , s e h c t i w S / s e g a G ® SERIES MP MINI-PHOTOHELIC® DIFFERENTIAL PRESSURE SWITCH/GAGE Compact, Low Cost Switch Gage LOW PRESSURE PORT HIGH PRESSURE PORT 3-1/32 [77.00] Ø2-19/32 [65.88] 1 [25.4] 3-1/16 [77.79] 3-1/32 [77.00] 3-13/16 [96.84] 9/32 [7.134] The Series MP Mini-Photohelic® Differential Pressure Switch/Gage combines the time proven Minihelic® II differential pressure gage with two SPDT switching set points. The Mini-Photohelic® switch/gage is designed to measure and control positive, negative, or differential pressures consisting of non-combustible and non-corrosive gases. Gage reading is independent of switch operation. Switching status is visible by LED indicators located on the front and rear of the gage. Set points are adjusted with push-buttons on the back of the unit. FEATURES/BENEFITS • Gage reading unaffected by switch operation and will continue to read pressure even during power loss • Visible switch status LED provides indication of set point switching state • Compact design but with the power of larger devices can meet the same application specifications APPLICATIONS • Fume hoods • Dust collection • Pneumatic conveying • Clean room SPECIFICATIONS GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±5% of FS @ 70ºF (21.1ºC). Gage face mounted in vertical position. Pressure Limits: 30 psig (2.067 bar). Temperature Limits: 20 to 120ºF (-6.7 to 49ºC). Process Connections: Barbed for 3/16˝ ID tubing (STD); 1/8˝ male NPT (optional). Size: 4-1/8˝ (104.78 mm) depth x 3-1/16˝ (77.79 mm) diameter. Weight: 23 oz (652 g). SWITCH SPECIFICATIONS Switch Type: (2) SPDT relays. Electrical Rating: 5 A @ 120/240 VAC resistive; 5 A @ 30 VDC. Electrical Connections: Screw type terminal block. Accepts 22-12 AWG wire. Power Requirements: 24 VDC / 24 VAC 50/60 Hz 4 watts. Mounting Orientation: Gage face in vertical position. Set Point Adjustment: Push-buttons. Standard Accessories: (2) mounting screws, (1) .050˝ hex allen wrench. Agency Approvals: CE, cULus. MODEL CHART Range, Inches of Water Model 0-0.5 0-1.0 0-2.0 0-3.0 0-5.0 0-10 0-20 Model MP-000 MP-001 MP-002 MP-003 MP-005 MP-010 MP-020 Model MP-1KPA MP-3KPA MP-125PA MP-250PA MP-500PA Range, Pa 0-125 0-250 0-500 Range, kPa 0-1 0-3 OPTIONS To order add suffix: Description -NPT Example: MP-000-NPT; Note: Allow additional lead time. NIST traceable calibration certificate -NIST Example: MP-005-NIST 1/8˝ male NPT connections ACCESSORIES Model A-301 A-302 A-302F-A A-489 Description Static pressure tip for 1/4˝ metal tubing connection Static pressure tip for 3/16˝ and 1/8˝ I.D. plastic or rubber tubing 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting screws 4˝ straight static pressure tip with flange 44 DWYER INSTRUMENTS, INC. | dwyer-inst.com Process Tubing Options: See page 455 (Gage Tubing Accessories)

E R U S S E R P s e h c t i w S e r u s s e r P l a i t n e r e f f i D ® SERIES AT1ADPS ATEX/IECEX APPROVED ADPS ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH The ADPS in Flame-Proof ATEX/IECEx Enclosure 1-31/32 [50.00] 7-3/32 [180.00] 5-33/64 [140.00] 4-17/32 [115.00] 5-33/64 [140.00] 4X 5/16 [Ø8.00] 1/8˝ NPT 2-9/16 [65.00] 1-32/64 [40.00] 4-27/32 [123.00] 7-1/4 [184.00] 6-19/64 [160.00] 25/64 [10.00] SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Diaphragm material: Silicone; Housing material: Switch body: PA 6.6 and POM; Cover: Polystyrene; Brass or SS depending on pressure connections chosen. Temperature Limits: Process and ambient temperature from -4 to 185°F (-20 to 85°C) (Note: Product temperature limits differ from case). Pressure Limits: 40 in w.c. (10 kPa). Switch Type: SPDT. Electrical Rating: Standard: Max. 1.5 A @ 250 VAC, max. switching rate: 6 cycles/ min. Set Point Adjustment: Hand knob on pressure switch inside case. (De-energize before opening case). Mounting Orientation: Vertically, with pressure connections pointing downwards. Mechanical Working Life: Over 106 switching operations. Enclosure Rating: IP66. IP65 with option OPV, overpressure relief valve. Housing Material: Aluminum. Finishing: Texture epoxy coat RAL7038. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Electrical Connections: Two 1/2˝ NPT female. Cable gland not included. Weight: 7 lb (3.2 kg). ATEX Certificate: BVI 14ATEX0072. Agency Approvals: ATEX Compliant II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. 1370 The Series AT1ADPS ATEX/IECEx Approved ADPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressure applications in hazardous areas. The dual scaled adjustment knob in inches water column and Pascals allows changes to the switching pressure to be made without a pressure gage. The switch is available with settings from 0.08 in w.c. (20 Pa) up to 16 in w.c. (4000 Pa). The silicone diaphragm makes this series ideal for use with air and other noncombustible gases. Flame-proof enclosures are available in aluminum and can include a glass window for viewing set point status on the adjustment knob. FEATURES/BENEFITS • Flame-proof enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to set point status APPLICATIONS • Hazardous area pressure switch • Air filter and ventilator monitoring • Ventilation duct monitoring • Industrial cooling circuits • Fan heater overheating protection • Fire-protection damper control • Heat exchanger frost protection MODEL CHART Example Series Range Connection Switch Housing Material Cover Process Connection Overpressure Plug Tag AT1ADPS -08 -2 -N -A O 1 X AT1ADPS 08 04 03 05 06 07 2 N A B O 1 2 X OPV T2 AT1ADPS-08-2-N-AO1XT2 ATEX/IECEx approved ADPS adjustable differential pressure switch .08 to 1.2 in w.c. (20 to 300 Pa) .12 to 1.6 in w.c. (30 to 400 Pa) .2 to 2 in w.c. (50 to 500 Pa) .8 to 4 in w.c. (200 to 1000 Pa) 2 to 10 in w.c. (500 to 2500 Pa) 4 to 20 in w.c. (1000 to 5000 Pa) Internal cable gland 1.5 A @ 250 VAC Aluminum Blind Glass top cover 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports T2 SS information label 46 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

® SERIES AT21823 ATEX/IECEX APPROVED 1823 DIFFERENTIAL PRESSURE SWITCH The 1823 in Flame-Proof ATEX/IECEx Enclosure 9-1/16 [230.00] 6-19/64 [160.00] 5-23/64 [136.00] 3-35/64 [90.00] 19/32 [15.00] 6-19/64 [160.00] 1-37/64 [40.00] Ø5/16 [Ø8.00] 15/16 [24.00] 1/8˝ NPT 2-3/4 [70.00] 8-5/64 [205.00] 7-11/64 [182.00] 5-63/64 [152.00] 1/8˝ NPT 19/32 [15.00] Essential for industrial environments, the Series AT21823 ATEX/IECEx Approved 1823 Differential Pressure Switch combines small size with 2% repeatability. Set point adjustment inside the switch allows for set point settings across 9 ranges from the low of .07 in w.c. to a maximum 85 in w.c. differential pressure. Series AT21823 flame-proof enclosures are available in aluminum and are ideal for low pressure hazardous area applications. Various housing options such as an overpressure relief valve or external set point adjustment knob are available. External set point knob allows adjustment without opening the enclosure. FEATURES/BENEFITS • Compact size and repeatability, provides a high-value switch for many industrial applications • External set point knob provides easy access that simplifies making adjustments without opening enclosure • Flame-proof enclosure protects the device in hazardous areas APPLICATIONS • Hazardous area pressure switch • Process applications • Mechanical equipment control Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area. SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Temperature Limits: -30 to 180°F (-34 to 82.2°C); 1823-00, -20 to 180°F (-28.9 to 82.2°C) (Note: Product temperature limits differ from case). Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge. Switch Type: SPDT. Repeatability: ±2% FS. Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for operation at high cycle rates. Mounting Orientation: Diaphragm in vertical position. Set Point Adjustment: Screw type inside mounting spud internal to switch. External set point adjustment knob optional. Enclosure Rating: IP66. IP65 with option OPV, overpressure relief valve or external set point adjustment knob. Housing Material: Aluminum. Finishing: Texture epoxy coat RAL7038. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Electrical Connections: Two 1/2˝ NPT female. Cable gland not included. Weight: 11.9 lb (5.4 kg). ATEX Certificate: BVI 14ATEX0072. Agency Approvals: ATEX Compliant II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. 1370 E R U S S E R P s e h c t i w S e r u s s e r P l a i t n e r e f f i D MODEL CHART Example AT21823 -00 -A O K1 1 X T2 AT21823-00-AOK11XT2 Series Range Housing Material Cover Set point Adjustment Process Connection Overpressure Plug Tag AT21823 ATEX/IECEx approved 1823 differential pressure switch 00 0 1 2 5 10 20 40 80 A B O K1 K2 .08 to .22 in w.c. (18 to 56 Pa) .15 to .5 in w.c. (38 to 127 Pa) .3 to 1 in w.c. (76 to 254 Pa) 0.5 to 2 in w.c. (127 to 508 Pa) 1.5 to 5 in w.c. (381 to 1270 Pa) 2 to 10 in w.c. (.5 to 2.5 kPa) 3 to 22 in w.c. (.76 to 5.6 kPa) 5 to 44 in w.c. (1.27 to 11.17 kPa) 9 to 85 in w.c. (2.28 to 21.6 kPa) Aluminum Blind Glass top cover Without external set point adjustment knob With external set point adjustment knob 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports T2 SS information label 1 2 X OPV 48 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

® SERIES AT11910 ATEX/IECEX APPROVED 1910 DIFFERENTIAL PRESSURE SWITCH The 1910 in Flame-Proof ATEX/IECEx Enclosure 7-3/32 [180.00] 1-31/32 [50.00] 5-33/64 [140.00] 4-17/32 [115.00] 5-33/64 [140.00] 1-37/64 [40.00] 7-1/4 [184.00] 6-19/64 [160.00] 4-27/32 [123.00] Ø5/16 [Ø8.00] 1/8˝ NPT 2-9/16 [65.00] 25/64 [10.00] 1/8˝ NPT Series AT11910 ATEX/IECEx Approved 1910 Differential Pressure Switch is our most popular switch and is now available in a flame-proof package. This pressure switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. For air and non-combustible compatible gases, the AT11910 Series switches have set points from 0.07 to 20 in w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside the switch enclosure. Series AT11910 enclosures are available in aluminum enclosures and ideal for low pressure, hazardous area applications. FEATURES/BENEFITS • Flame-proof enclosure protects the device in hazardous areas • Compact size and repeatability, provides a high-value switch for many industrial and OEM applications • Wide range of models from 0.07 in w.c. to 20 in w.c. can meet exacting OEM specifications for a low pressure switch • Range screw protected inside switch enclosure prevents tampering APPLICATIONS • Hazardous area low pressure applications • Air conditioning refrigeration coil icing detection; defrost cycle initiation • Clogged filter detection • Variable air volume controller Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area. SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Temperature Limits: -30 to 180°F (-34 to 82.2°C) (Note: Product temperature limits differ from case). Pressure Limits: 45 in w.c. (11.2 kPa) continuous, 10 psig (68.95 kPa) surge. Switch Type: SPDT. Repeatability: ±3% FS. Electrical Rating: 15 A @ 120 to 480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. Derate to 10 A for operation at high cycle rates. Mounting Orientation: Diaphragm in vertical position. Set Point Adjustment: Screw type on pressure switch inside the enclosure accessible by hole with plug on housing. Set point regulation must be done with instrument de-energized. Follow instructions and safety warning to open cover. Enclosure Rating: IP66. IP65 with option OPV, overpressure relief valve. Housing Material: Aluminum. Finishing: Texture epoxy coat RAL7038. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Electrical Connections: Two 1/2˝ NPT female. Cable gland not included. Weight: 7.49 lb (3.4 kg). ATEX Certificate: BVI 14ATEX007. Agency Approvals: ATEX Compliant tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. II 2G Ex d IIC T6 Gb / II 2D Ex 1370 E R U S S E R P s e h c t i w S e r u s s e r P l a i t n e r e f f i D MODEL CHART Example Series Range AT11910 AT11910 Housing Material Cover Process Connection Overpressure Plug Tag -00 -A B 1 X T2 AT11910-00-AB1XT2 00 0 1 5 10 20 A B 1 2 X OPV ATEX/IECEx approved 1910 differential pressure switch .07 to .15 in w.c. (17.5 to 37 Pa) .15 to .55 in w.c. (37.5 to 137 Pa) .4 to 1.6 in w.c. (100 to 398 Pa) 1.4 to 5.5 in w.c. (348.5 to 1368 Pa) 3 to 11.75 in w.c. (747 to 2924 Pa) 4 to 20 in w.c. (996 to 4977 Pa) Aluminum Blind 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports T2 SS information label 50 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

E R U S S E R P s e h c t i w S e r u s s e r P l a i t n e r e f f i D ® SERIES 1831 DPDT LOW DIFFERENTIAL PRESSURE SWITCHES Manual Reset, No Power Required 2-5/32 [54.76] CLEARANCE FOR COVER REMOVAL 2X Ø7/8 CONDUIT OPENING 4-3/8 [111.13] 2X 3-1/16 [77.79] 3-11/16 [93.65] RESET LEVER 1/8 FEMALE NPT HIGH PRESSURE OPENING ø.875 [22.23] 2X ø9/64 [3.57] 3-1/4 [82.55] 1/8 FEMALE NPT LOW PRESSURE CONNECTION 1/2 MALE NPT MOUNTING STUD 3/4 [19.05] 3-3/16 [80.98] 2-5/16 [58.74] A-389 mounting bracket YEAR LIMITED WARRANTY 2-3/4 [69.86] 3X 2 [50.80] V I DEO O N L I N E 1-5/8 [41.28] 4-1/16 [103.19] 3-5/8 [92.08] 1-3/32 [27.76] 1-7/64 [28.17] Note: Shown with included mounting bracket. Bracket can rotate and be tightened at any angle. One of our most popular differential pressure switches is now available with a DPDT switch and manual reset. The Series 1831 DPDT Low Differential Pressure Switches combine small size with 4% set point repeatability. Absolutely no power is required to operate the DPDT switch. Set point adjustment on the switch is easily accessible for modifying the set point. The Series 1831 DPDT Low Differential Pressure Switches with Manual Reset eliminate common problems associated with typical high duct static cutout installations. Since the 1831 requires absolutely no power to drive its outputs, a separate power loop and its associated additional wiring and conduit is alleviated, reducing material and labor installation costs. Both control contacts of the Series 1831 activate at the same time. The potential of the lead switch shutting down the fan preventing the lag switch from sending an alarming signal to the DDC is no longer a probable system liability. Potential costly maintenance calls are diminished. Unlike typical switches that possess only a single conduit entry for both control loops, the Series 1831 provides two conduit connections simplifying wiring while eliminating additional conduit tees. FEATURES/BENEFITS • No power to operate DPDT switch means no additional wiring or conduit reduces material and installation labor costs • Easy access for modifying set point simplifies adjustment • Both control contacts activate at the same time eliminating system issues where lead switch activities prevent the lagging switch from sending a signal APPLICATIONS • High duct static cutout applications • HVAC MODEL CHART Model 1831-1-RA-S 1831-2-RA-S Description Manual reset DPDT, activate on increase Manual reset DPDT, activate on increase Range (in w.c.) 2.5 to 9 7.5 to 23 A-302F-B A-302F-C SERIES 1640 SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Temperature Limits: -30 to 180°F (-34 to 82.2°C). Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge. Switch Type: 2 SPDT. Actuation Time Difference: 1 millisecond maximum actuation delay between contacts. Repeatability: ±4% max. Electrical Rating: 4 A @ 125/250 VAC. Electrical Connections: Screw type terminal block. Process Connections: 1/8˝ female NPT. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Screw type inside mounting spud. Weight: 1 lb 2 oz (522 g). ACCESSORIES Model A-489 A-491 A-493 A-302F-A Description 4˝ straight static pressure tip with flange 6˝ straight static pressure tip with flange 8˝ straight static pressure tip with flange 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting screws 303 SS static pressure tip with mounting flange; for 3/16˝ rubber or plastic tubing; 6˝ insertion depth; includes mounting screws 303 SS static pressure tip with mounting flange; for 3/16˝ rubber or plastic tubing; 8˝ insertion depth; includes mounting screws Process Tubing Options: See page 455 (Gage Tubing Accessories) FLOATING CONTACT NULL SWITCH FOR HIGH AND LOW ACTUATION Visual Set Point Adjustment, Adjustable Null Zone 2 [50.80] Ø7-7/8 1/2 [12.70] TYP TYP 4 3 [76.20] [101.60] TYP 3-1/8 [79.37] Ø9/32 [7.14] MOUNTING HOLE TYP 4 PLACES 21/32 [16.66] 3 [76.20] 6-1/2 [165.10] 1/2 CONDUIT CONNECTION 1/8 FEMALE NPT LOW PRESSURE CONNECTION 22.5° 1/8 FEMALE NPT HIGH PRESSURE CONNECTION The unique electric switch design in the Series 1640 Floating Contact Null Switch for High and Low Actuation is another Dwyer Instrument, Inc. innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the high precision large diaphragm Series 1630 switches. However, the Model 1640 is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch. As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points. The “high” circuit will be closed when rising pressure differential reaches the preset level. The “low” circuit will be closed when falling pressure differential reaches the preset level. FEATURES/BENEFITS • Floating “null” switch supports applications requiring two set point actions such as open and close damper control • Visible set point indicator simplifies operation and trouble shooting • Large diaphragm provides low range accuracy providing precise control APPLICATIONS • Damper positioning • Duct air control SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Temperature Limits: -30 to 110°F (-34.4 to 43.3°C). Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge. Switch Type: SPDT floating contact (not snap action). Electrical Rating: Non-inductive — 2.5 A @ 110 VAC; 1.5 A @ 220 VAC; 1 A @ 24 VDC; 0.5 A @ 110 VAC; Inductive — 1 A @ 110 VAC; 0.5 A @ 220 VAC; 0.5 A @ 24 VDC (de-rate 70-80% for very slow pressure changes). Electrical Connections: 3 screw type. Process Connections: 1/8˝ female NPT. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Screw type. Weight: 4 Ib 13 oz (2.18 kg). Agency Approvals: CE. MODEL CHART Ranges in w.c. .01 to 0.2 0.2 to 1.0 1.0 to 4.0 Model 1640-0 1640-1 1640-2 Adjustable Null Span Min. Set Point Max. Set Point .01 .02 .03 .03 .06 .12 Process Tubing Options: See page 455 (Gage Tubing Accessories) 52 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES 1996 GAS PRESSURE SWITCH Compact, Low Cost, 1.4 to 20 in w.c. Range E R U S S E R P Reliable and convenient, the Series 1996 Gas Pressure Switch serves as a compact, low cost switch for gas fired furnaces and equipment. Pressure ranges for both models are ideal for high or low gas pressure interlock. Visible set point and on-off indicators add convenience in servicing. Use either NO or NC contacts on SPDT switch. Bottom connection has both 1/8˝ female and 1/4˝ male threads for pipe nipple or coupling. Top connection vents diaphragm chamber to outside or to furnace combustion chamber. Mount switch with diaphragm in a horizontal position and gas pressure connection at bottom. Used with natural, manufactured or LP gas.uv FEATURES/BENEFITS • Visible set point and on-off indicator simplifies operation and trouble shooting • Compact size and low cost make it ideal for gas fired or gas equipment OEM applications APPLICATIONS • Gas furnaces • Natural, manufactured or LP gas applications MODEL CHART Model Range (in w.c.) Model Range (in w.c.) 1996-5 1.4 to 5.5 1996-20 4-20 3-1/8 [79.38] 3-1/2 [88.90] REMOVABLE CONDUIT ENCLOSURE COVER Ø7/8 [22.23] OPENING FOR 1/2 CONDUIT CONNECTION WINDOW AND VISIBLE ON-OFF INDICATOR VENT CONNECTION ON OPPOSITE SIDE 1/4 NPT EXTERNAL THREAD [ALTERNATE GAS CONNECTION] 1/8 [F] GAS PRESSURE CONNECTION SPECIFICATIONS Service: Air, natural & manufactured gas, LP gas. Wetted Materials: Consult factory. Temperature Limits: 32 to 110°F (0 to 43.3°C). -30 to 110°F (-34.4 to 43.3°C) for dry gas or dry air. Pressure Limits: 45 in w.c. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge. Switch Type: SPDT. Electrical Rating: 15A @ 120-480 VAC, 60 Hz. Resistive 1/8 H.P. @ 125 VAC, 1/4 H.P. @ 250 VAC 60 Hz. Electrical Connections: 3 screw type, common, normally open, normally closed. Process Connections: 1/8˝ female NPT or 1/4˝ male NPT. Vent Connection: 1/8˝ female NPT. Mounting Orientation: Diaphragm in horizontal position. Consult factory for other position orientations. Set Point Adjustment: Screw type with visible indicator, inside conduit enclosure. Weight: 1 lb 2.3 oz (349 g). Agency Approvals: CE, CSA, FM, UL. uExplosion-Proof Alternative: See page 55 (Series 1950) vExplosion-Proof Alternative: See page 55 (Series 1950G) Process Tubing Options: See page 455 (Gage Tubing Accessories) s e h c t i w S e r u s s e r P l a i t n e r e f f i D SERIES PG | MERCOID® BY DWYER GAS PRESSURE/DIFFERENTIAL PRESSURE SWITCHES External Adjustment, Visible Dial, Hermetically Sealed Snap or Mercury Switch ADJUSTMENT V I DEO O N L I N E SCREW [3] Ø13/64 [5.16] MOUNTING HOLES EQUALLY SPACED ON 6-1/2 [165.10] B.C. Ø6-1/64 [152.78] Ø7 [177.80] 8-1/4 1/8 FEMALE NPT PRESS. CONN. 30° [209.55] 45° Ø7/8 [22.23] CONDUIT CONNECTION 1/2 MALE NPT X 1/8 FEMALE NPT PROCESS CONN. 1/4 [6.35] 3/4 [19.05] CLEARANCE FOR COVER REMOVAL 4 [101.6] 1-27/64 [36.12] 17/32 [13.49] 1-3/16 [30.16] The Series PG Gas Pressure/Differential Pressure Switch has a large sensitive diaphragm and a reliable time proven mechanical design. For use with air and other compatible gases, they feature excellent ±1% of full-scale repeatability, clear easy-to- read scale and convenient external set point adjustment. Application flexibility is assured by a large variety of switching options including SPST, SPDT, DPST and DPDT; opening or closing on increasing pressure, vacuum or differential. PR and PRL models add manual reset operation on increasing or decreasing pressure. Mercury switches or hermetically sealed snap switches are available where high humidity would be a problem. If vibration or other factors preclude the use of mercury, snap switches can be provided. Standard housing is NEMA 1. Optional enclosures can be supplied for weather resistant and explosion- proof requirements. FEATURES/BENEFITS • Clear easy-to-read scale and external set point adjustment simplifies operation and trouble shooting • Large diaphragm provides accuracy for precise control • Multiple switching options meet the design of applications APPLICATIONS • Natural, manufactured or LP gas applications SPECIFICATIONS Wetted Materials: Fairprene, brass, steel, and aluminum. Temperature Limits: -10 to 180°F (-23 to 82°C). Pressure Limit: Single pressure use on high side: Sustained pressure: 15 psig (1.0 bar); Surge limit: 20 psig (1.4 bar). Differential pressure use: Sustained pressure, range P1: 2 psig (.14 bar); Sustained pressure, range P2: 10 psig (0.7 bar). Enclosure Rating: General purpose. Weatherproof and explosion-proof optional. Repeatability: ±1% of full range. Switch Type: SPST mercury switch, SPDT mercury switch, SPDT snap switch, or SPDT hermetically sealed snap switch. Optional DPDT. Electrical Rating: SPDT mercury: 4A @ 120 VAC/VDC, 2A @ 240 VAC/VDC. SPST mercury: 6A @ 120 VAC/VDC, 3A @ 240 VAC/VDC. SPDT Snap: 15A @ 120 VAC, 8A @ 240 VAC, 0.5A @ 120 VDC, 0.25A @ 240 VDC. SPDT H.S. Silver Snap: 5A @ 125/250 VAC, 30 VDC resistive. SPDT H.S. Gold Snap: 1A @ 125 VAC, 30 VDC resistive. Electrical Connections: Screw type. Conduit Connection: 7/8˝ (22.23 mm) hole for 1/2˝ (12.7 mm) conduit hub. Process Connection: 1/2˝ male NPT and 1/8˝ female NPT used for single positive pressure or high differential pressure, 1/8˝ female NPT used for single vacuum or low differential pressure. Mounting Orientation: Vertical. Set Point Adjustment: External screw. Weight: 4.5 lb (2 kg). Deadband: See model chart. Agency Approvals: FM, UL for mercury switch models. UL only on snap switch models. MODEL CHART Model PG-153-P1 PG-153-P2 PG-3-P1 PG-3-P2 Range 1-30 in w.c. (.25-7.47 kPa) 0.5-5 psid (0.3-.345 bar) 1-30 in w.c. (.25-7.47 kPa) 0.5-5 psid (.03-.345 bar) SPDT mercury Max. Deadband Switch Type 1.9 in w.c. (0.47 kPa) 0.4 psid (0.38 bar) 1.3 in w.c. (0.32 kPa) 0.3 psid (0.21 kPa) SPDT mercury SPST mercury* SPST mercury* Model PG-7000-153-P1 PG-7000-153-P2 PG-7000-153HS-P1 PG-7000-153HG-P1 Range 1-30 in w.c. (.25-7.45 kPa) 0.5-5 psid (.03-.345 bar) 1-30 in w.c. (.25-7.47 kPa) 1-30 in w.c. (.25-7.47 kPa) SPDT snap Max. Deadband Switch Type 4 in w.c. (1.0 kPa) .5 psid (.035 bar) 4 in w.c. (1.0 kPa) 4 in w.c. (1.0 kPa) SPDT hermetically sealed silver snap SPDT hermetically sealed gold snap SPDT snap *SPST switches shown are close on increase of pressure. For open on increase of pressure replace 3 in middle of model number with 2. Example: PG-2-P1. USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov 54 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES H3 | W. E. ANDERSON™ BY DWYER EXPLOSION-PROOF DIFFERENTIAL PRESSURE SWITCH Set points from 10 in w.c. to 200 psid, Rated 1500 psig, Weatherproof Internal terminal blocks for conductors up to 18 gage are optional COVER SET SCREW COVER 3/4 NPT CONDUIT CONNECTION Optional NEMA 3 (lP54) enclosure includes explosion-proof drain; Standard NEMA 4X (IP56) version is without drain 2-13/32 [61.12] 5-3/8 [136.53] 31/32 [24.61] Ø11/64 [Ø4.37] MOUNTING HOLES IN MTG BRACKET 1/8 NPT LOW PRESSURE CONNECTION 17/32 [13.5] 1/8 NPT HIGH PRESSURE CONNECTION 3 [762] 1-25/32 [45.24] 3-9/16 [90.49] 4 [101.6] 1-3/4 [44.45] V I DEO O N L I N E Shown without enclosure and cover External ground connection standard (internal ground connection also standard, use either one) OPTIONAL DRAIN PROCESS CONNECTION CENTERLINE E R U S S E R P s e h c t i w S e r u s s e r P l a i t n e r e f f i D The Series H3 Explosion-Proof Differential Pressure Switch is a heavy duty, industrial unit with a unique new design which provides sensitivity to differential pressures as low as 10 inches of water (254 mm w.c.), yet handles total pressure of 1500 psi (103 bar). Unlike common differential pressure switches that use a piston- type motion transfer, the Series H3 utilizes a rotary motion transfer shaft that prevents a change in total pressure from causing a set point shift. Unit yields deadbands approximately 5% of range, with zero set point shift due to variation in working pressures. Friction is minimized and repeatability increased by allowing range spring to act directly on diaphragm plate. Rolling diaphragm design maintains constant effective area to further reduce friction. Diaphragm is allowed to “seat”, allowing application of full rated pressure, up to 1500 psi (103 bar), on either high or low pressure port, without damage. Special over-travel feature prevents overtightening of range adjust screw. Choose optional 316 SS chamber for water and water-based fluids or harsher applications. FEATURES/BENEFITS • Rotary motion design prevents set point shifts • Explosion-proof housing for use in applications where protection of process and personnel is needed • Option for use with water and water-based solution makes this a versatile switch APPLICATIONS • Water flow proving with an orifice plate • Differential pressure across chiller • Liquid filter status SPECIFICATIONS Wetted Materials: See pressure chamber and diaphragm material in model chart. Temperature Limit: -4 to 220°F (-20 to 104°C), ATEX: -20 to 90°C (-4 to 194°F). Pressure Limit: 1500 psig (103 bar). Enclosure Rating: Standard meets NEMA 4X (IP56), drain option meets NEMA 3 (IP54). For hazardous use see the hazardous location ratings chart. Switch Type: SPDT or DPDT snap switch. Electrical Rating: 5 A @ 125/250 VAC, 30 VDC. Electrical Connections: See model chart. Conduit Connection: 3/4˝ female NPT. Process Connection: 1/8˝ female NPT. Mounting Orientation: Vertical. Set Point Adjustment: Internal screw. Weight: 4 lb 2 oz (2 kg). Deadband: Approximately 5% of range. Agency Approvals: ATEX, CE, CSA, UL see ratings chart. MODEL CHART Example Series Pressure Chamber & Diaphragm Material (Wetted) Adjustable Operating Range Circuit (Switch) Options Electrical Connection Options H3 S -2 S C -MV H3S-2SC-MV H3 A S 1 2 3 4 S D L T C Drain MV VIT Explosion-proof differential pressure switch Aluminum chamber with Nitrile diaphragm 316 SS chamber with Fluoroelastomer diaphragm 10-180 in. w.c. (2.48-44.78 kPa) 0.5-15 psid (0.03-1 bar) 5-70 psid (.34-4.8 bar) 10-200 psid (.7-13.8 bar) SPDT snap action switch rated 5 A @ 125/250 VAC, 30 VDC DPDT snap action switch rated 5 A @ 125/250 VAC, 30 VDC 18 AWG x 18 inch lead wires UL, CSA approved internal terminal block ATEX approved internal terminal block Enclosure with drain - allows condensate to be drained from inside (meets NEMA 3 instead of 4X) Gold contacts on snap switch for dry circuits rated 1 A @ 125 VAC, 1A resistive or 0.5 A inductive @ 30 VDC Fluoroelastomer diaphragm option where not standard HAZARDOUS LOCATION RATINGS Model H3 _ – _ _ C UL - CSA - H3 _ – _ _ L H3 _ – _ _ T H3 _ – _ _ C-DRAIN CI. I, Gr.B, C & D CI. II, Gr.E, F & G CI. I, Gr.B, C & D CI. II, Gr.E, F & G - CI. I, Gr.B, C & D CI. II, Gr.E, F & G CI. I, Gr.B, C & D CI. II, Gr.E, F & G - H3 _ – _ _ L-DRAIN CI. I, Gr.B, C & D CI. II, Gr.E, F & G - Directive 2014/34/EU ATEX Compliant 0344 II 2 G EEx d IIB -20°C≤ T amb ≤ 75°C T6 EC-Type Certificate No. KEMA 03ATEX 2584 - - 0344 II 2 G EEx d IIB -20°C≤ T amb ≤ 75°C T6 EC-Type Certificate No. KEMA 03ATEX 2584 - 56 DWYER INSTRUMENTS, INC. | dwyer-inst.com ACCESSORIES Model Description A-610 Pipe mounting kit for 1-1/4 to 2˝ pipe

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES 616KD DIFFERENTIAL PRESSURE TRANSMITTERS ±0.25, ±1, OR ±2% ACCURACY One-Touch® Digital Push-Button Calibration Technology YEAR LIMITED WARRANTY Optional protective cap OPTIONAL TERMINAL COVER 5/8 [15.88] 5/16 [7.94] 3-21/64 [84.53] 2-13/32 [61.12] V I DEO O N L I N E Integral DIN rail mounting kit ø5/32 [3.97] MOUNTING HOLE 2 PLACES 1/2 [12.70] Digital push-button sets both zero & span 1/2 [12.70] 7/8 [22.23] 1-1/32 [26.19] 1-1/2 [38.10] 2-1/4 [57.15] 2-13/32 [61.12] The Series 616KD Differential Pressure Transmitters ±0.25, ±1, or ±2% Accuracy with One-Touch® Digital Push-Button Calibration Technology are designed for simplicity, making them the ideal choice for installers and maintenance professionals. These instruments not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instruments during calibration. With a single digital push-button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources or separate calibration devices are necessary. FEATURES AND BENEFITS • Simple calibration push-button sets back zero and span, saving time installing and over the service life • Cost effective and compact device suitable for OEM applications where space, simplicity, and value are key • Ranges and accuracy selection cover a wide range of applications minimizing components and determining standardizing on design • Optional 1/8˝ NPT process connection allows for use with metal barbed fittings or compression fittings for use with metal tubing • Optional plenum rated units meeting UL Standard 2043 are available APPLICATIONS • Air handlers • Variable air volume • Duct pressure • Filter monitoring MODEL CHART Example 616KD -A -12 -AT Series Accuracy 616KD A B Range Options 00 01 02 03 04 05 06 07 08 10 11 12 13 14 15 50 51 57 52 53 54 55 56 58 AT FC NIST TC V N PR 616KD-A-12-AT Differential pressure transmitter 0.25% full-scale accuracy 1.0% full-scale accuracy 2.0% full-scale accuracy 0 to 1 in w.c. 0 to 2 in w.c. 0 to 3 in w.c. 0 to 5 in w.c. 0 to 10 in w.c. 0 to 15 in w.c. 0 to 20 in w.c. 0 to 25 in w.c. 0 to 40 in w.c. 0 to 250 Pa 0 to 500 Pa 0 to 750 Pa 0 to 1250 Pa 0 to 2500 Pa 0 to 5000 Pa 0 to ±1 in w.c. 0 to ±2 in w.c. 0 to ±3 in w.c. 0 to ±5 in w.c. 0 to ±10 in w.c. 0 to ±250 Pa 0 to ±500 Pa 0 to ±750 Pa 0 to ±1250 Pa Aluminum tag Factory calibration NIST certification Terminal cover Voltage output 0-5, 1-5, 0-10, 2-10 VDC (field selectable) 1/8˝ female NPT Plenum rated SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: 616KD-A: ±0.25% FS; 616KD-B: ±1% FS, 616KD: ±2% FS. Stability: ±1% FS/year. Temperature Limits: 0 to 140°F (-17.8 to 60°C). Compensated Temperature Range: 20 to 122°F (-6.67 to 50°C). Pressure Limits: 2 psig (ranges 5 in w.c. or lower); 5 psig (ranges 10 to 40 in w.c.). Thermal Effect: 616KD-A: ±0.02% FS/°F; 616KD-B: ±0.04% FS/°F; 616KD: ±0.06% FS/°F, includes zero and span. Power Requirements: 4-20 mA output: 10-35 VDC (2 wire) or 12-26 VAC (4 wire); 5V output: 10-35 VDC (3 wire) or 12-26 VAC (4 wire); 10V output: 13-35 VDC (3 wire) or 12-26 VAC (4 wire) for 616KD A and B. 16-36 VDC (2 or 3 wire): 20-28 VAC (3 wire) for 616KD. Output Signal: 4-20 mA or option with field selectable 0-10, 0-5, 2-10, 1-5 V. Zero and Span Adjustments: Push button. Loop Resistance: 4-20 mA output (DC): 0 to 1250 Ω max. Rmax = 50 (VpsDC -10) Ω; 4-20 mA output (AC): 0 to 1200 Ω max. Rmax = 50 (1.4 VpsAC -12) Ω; Voltage output: 5K Ω minimum. Current Consumption: 24 mA max for 616KD A and B. 21 mA max for 616KD. Electrical Connections: Screw-type terminal block. Process Connections: Barbed, dual size to fit 1/8˝ & 3/16˝ (3 mm and 5 mm) ID rubber or vinyl tubing. Enclosure Rating: NEMA 1 (IP20). Mounting Orientation: Vertical with pressure connections pointing down. Weight: 1.8 oz (51 g). Agency Approvals: CE, optional plenum rated units meet UL Standard 2043. ACCESSORIES Model Description A-360 A-618 Aluminum DIN rail 1 m Protective terminal cap Optional NPT connection block Note: 0.25% FS accuracy is not available in the following ranges 00, 01, 10, 11, 50, 51, 54, 55 58 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D 668B 3-15/32 [88.00] 3-5/32 [80.00] 668B 1-9/32 [32.60] 668D 668D Our low cost Series 668B/D Compact Differential Pressure Transmitters are capable of sensing differential gage pressure with ±0.8% FS accuracy, and converts this pressure difference to a proportional high level analog output for both unidirectional and bi-directional pressure ranges. These transmitters can withstand up to 15 psig overpressure with no damage to the unit. The compact, lightweight design makes installation simple and easy. Units are protected against incorrect wiring, and include a protective terminal cover. FEATURES/BENEFITS • Protection from 15 psi overpressure & incorrect wiring • High accuracy at low pressure ranges • Two package selections allows easy device mounting to best fit application pressure connections APPLICATIONS • HVAC and VAV control • Clean rooms and isolation rooms • Duct static pressure measurement ® SERIES 668B/D COMPACT DIFFERENTIAL PRESSURE TRANSMITTERS Ranges from 0.1 to 100 in w.c., Overpressure Protection to 15 psig, ±0.8% Accuracy 3-15/32 [88.00] 3-5/32 [80.00] 2X 3/16 [ø4.80] 1-13/32 [35.60] 1-57/64 [48.20] 1-45/64 [43.25] 1-45/64 [43.25] 1-3/16 [30.20] 1-57/64 [48.20] 1-7/32 [30.80] 2X 3/16 [ø4.80] 3-21/32 [92.94] SPECIFICATIONS Service: Air and non-conductive gases. Accuracy: ±0.8% FS. Temperature Limits: Operating: 0 to 170°F (-18 to 77°C); Storage: -40 to 185°F (-40 to 85°C). Pressure Limits: 15 psig (1.0 bar). Thermal Effects: ±0.03% FS/°F (±0.054% FS/°C). Compensated Range: From 40 to 170°F (4.4 to 77°C). Power Requirements: 12-32 VDC. Output Signals: 4-20 mA (2-wire), 0-10 VDC (3-wire), or 0-5 VDC (3-wire). Zero Adjustment: Accessible under the small terminal cover. Electrical Connection: Terminal strip. Process Connection: 3/16˝ OD barbed brass for 1/8˝ ID push-on tubing. Enclosure: Stainless steel and PC+ABS alloy, UL 94 V-0 rated. Weight: 4.0 oz (113 g). ACCESSORIES Model Description A-TC Replacement protective terminal cover A-TC shown attached OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov 668 B -08 -1 668B-08-1 668 MODEL CHART Example Series Connection Unidirectional Pressure Ranges B D 01 21 02 22 03 04 05 06 07 08 09 10 12 13 14 15 16 17 18 19 Compact differential pressure transmitter Front Bottom 0 to 0.1 in w.c. 0 to 0.2 in w.c. 0 to 0.25 in w.c. 0 to 0.4 in w.c. 0 to 0.5 in w.c. 0 to 1 in w.c. 0 to 2.5 in w.c. 0 to 5 in w.c. 0 to 10 in w.c. 0 to 25 in w.c. 0 to 50 in w.c. 0 to 100 in w.c. 0 to ±0.1 in w.c. 0 to ±0.25 in w.c. 0 to ±0.5 in w.c. 0 to ±1 in w.c. 0 to ±2.5 in w.c. 0 to ±5 in w.c. 0 to ±10 in w.c. 0 to ±25 in w.c. 4 to 20 mA 0 to 10 VDC 0 to 5 VDC Output 1 2 3 60 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES 616W DIFFERENTIAL PRESSURE TRANSMITTER NEMA 4X Enclosure, 0.25% FS Accuracy 3-1/8 [79.38] V I DEO O N L I N E 4-1/2 [114.30] 5-1/8 [130.18] 1-3/16 [30.18] 3-3/4 [95.25] 2-1/8 [53.98] 3/4 [19.05] TYP Ø3/16 [4.76] MOUNTING HOLES TYP 4 PLACES 1-1/4 [31.75] 1-5/16 [33.32] TYP 7/16 OR 5/8 [11.13 OR 15.88] TYP 1/8 AND 3/16 [3.18 AND 4.76] I.D. TUBING 4-17/32 [115.09] 3-1/8 [79.38] E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D Positive, negative and differential pressures can be measured within a full span accuracy of ±0.25 with the Series 616W Differential Pressure Transmitter. Units are enclosed in a polycarbonate case, rated NEMA 4X (IP66) and operate by sensing the pressure of air and compatible gases then sending a standard 4-20 mA output signal. Design enables operation in 2-wire current loops. A wide range of models are available factory calibrated to specific ranges. The span and zero controls are for use when checking calibration. They are not intended for re-ranging to a significantly different span. The LCD display allows local indication of pressure. FEATURES/BENEFITS • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists • Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread • Zero and span controls provides easy calibration checks and shorter installation time to get device running and monitoring APPLICATIONS • Dust collection • Outdoor HVAC • Roof-top equipment SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±0.25% FS @ 77°F (25°C), display accuracy ±0.5%. Stability: ±1% FS/yr. Temperature Limits: 14 to 185°F (-10 to 85°C). Pressure Limits: See chart. Power Requirements: 10-35 VDC (2-wire), 17-36 VDC, or isolated 21.6-33 VAC (3-wire). Output Signal: 4-20 mA (2-wire), 0-5 VDC, or 0-10 VDC (3-wire). Zero and Span Adjustments: Push- buttons. Loop Resistance: Current output: 0 to 1250 Ω max; Voltage output: Load resistance 1 kΩ (min). Current Consumption: 40 mA (max). Electrical Connections: 3-wire removable European style terminal block for 16 to 26 AWG. Process Connections: Barbed, dual size to fit 1/8˝ and 3/16˝ (3.12 and 4.76 mm) ID rubber or vinyl tubing. Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Any orientation. Weight: Without LCD 8.8 oz. (249 g); with LCD 9.6 oz (272 g). Agency Approvals: CE. MODEL CHART Model 616W-2-LCD 616W-3-LCD 616W-4-LCD 616W-5-LCD 616W-6-LCD 616W-7-LCD 616W-20B-LCD 616W-3M-LCD Note: Units with “M” in the model number are metric units. Max. Pressure 10 psig 10 psig 20 psig 20 psig 15 psig 45 psig 10 psig 68.9 kPa Range 0 to 6 in w.c. 0 to 10 in w.c. 0 to 20 in w.c. 0 to 40 in w.c. 0 to 100 in w.c. 0 to 200 in w.c. 0 to ±10 in w.c. 0 to 2.5 kPa SERIES 616WL OPTIONS To order add suffix: Description -NIST Example: 616W-3-LCD-NIST NIST traceable calibration certificate Process Tubing Options: See page 455 (Gage Tubing Accessories) DIFFERENTIAL PRESSURE TRANSMITTER Low Ranges Down to 0.25 in w.c. (60 Pa), NEMA 4X Housing (IP66) 3-1/8 [79.38] 3/16 [4.76] MOUNTING HOLES TYP 4 PLCS 4-17/32 [115.09] 5-1/8 4-17/32 [115.09] V I DEO O N L I N E [130.18] 63/61 [25.00] 2-21/32 [67.47] 47/64 [18.65] 3-45/64 [94.06] FITTING TO ACCOMODATE CABLE DIAMETERS OF .100 - .260 1/8 AND 3/16 [3.18 AND 4.76] I.D. TUBING 3-1/8 [79.38] 49/64 [19.45] 1-1/8 [28.58] 2-37/64 [65.48] The Series 616WL Differential Pressure Transmitter senses very low pressures of air and non-combustible, compatible gases and sends a standard 4-20 mA output signal. All models, including those featuring the 3 digit LCD digital read-out, are factory calibrated to specific ranges as listed in the chart below. Positive, negative and differential pressures can be measured within a full span accuracy of ±0.50%. This weatherproof unit is enclosed in a polycarbonate case, designed to meet (IP66/ NEMA 4X). Internal digital push-button zero and span allow for quick and simple field calibration. FEATURES/BENEFITS • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists • Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread • Zero and span controls provides easy calibration checks and shorter installation time to get device running and monitoring • High precision accuracy at low pressure ranges provides exceptional accuracy for insuring tight-control and minimizing costly out of specification conditions APPLICATIONS • Low pressure applications • Dust collection • Outdoor HVAC • Roof-top equipment OPTIONS To order add suffix: -NIST Example: 616WL-4-LCD-NIST Description NIST traceable calibration certificate 62 DWYER INSTRUMENTS, INC. | dwyer-inst.com SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: ±0.50% FS, display accuracy ±0.5%. Stability: ±1% FS/yr. Temperature Limits: 0 to 140°F (-17.8 to 60°C). Compensated Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Pressure Limits: See chart. Thermal Effect: ±0.02% FS/°F (0.036% FS/°C). Power Requirements: 12-30 VDC (2-wire). Output Signal: 4-20 mA. Zero and Span Adjustments: Digital, push-button adj. Loop Resistance: DC; 0 to 900 Ω max. Current Consumption: DC; 38 mA max. Electrical Connections: Screw-type terminal block. Process Connections: Barbed, dual size to fit 1/8˝ and 3/16˝ (3.12 and 4.76 mm) ID rubber or vinyl tubing. Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Vertical, consult factory for other position orientations. Weight: Without LCD 17 oz (482 g); with LCD 18 oz (510 g). Agency Approvals: CE. MODEL CHART Model 616WL-2-LCD 616WL-4-LCD 616WL-12-LCD 616WL-14-LCD 616WL-22-LCD 616WL-32-LCD 616WL-25-LCD 616WL-35-LCD Range 0 to 0.25 in w.c. 0 to 1 in w.c. 0 to ±0.25 in w.c. 0 to ±1 in w.c. 0 to 60 Pa 0 to ±60 Pa 0 to 250 Pa 0 to ±250 Pa Max. Pressure 2 psig 4 psig 2 psig 4 psig 2 psig 2 psig 4 psig 4 psig Process Tubing Options: See page 455 (Gage Tubing Accessories)

® SERIES 605 MAGNEHELIC® DIFFERENTIAL PRESSURE INDICATING TRANSMITTER Same Size as Standard Magnehelic® Differential Pressure Gage 23/32 [18.26] 1 [25.40] 30° [3] #6-32 x 3/16 [4.76] DP HOLES EQUALLY SPACED ON A Ø4-1/8 [104.78] B.C. FOR PANEL MOUNTING 1-1/8 [28.58] 11/16 [17.46] 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 1-3/4 [44.45] 1-1/4 [31.75] 1/2 [12.70] 1/8 FEMALE NPT LOW PRESSURE CONNECTION 2-1/2 [63.50] 2-1/16 [52.39] [4] 6-32 HOLES EQUALLY SPACED ON A 5-1/8 [130.18] B.C. FOR FLUSH MOUNTING 2 [50.80] Ø4-47/64 [ 120.25] Ø5 [127.00] 5/8 [15.88] PANEL MAX 3/16 [4.76] Ø4 [101.60] FACE 5-1/2 [139.70] O.D. MOUNTING RING E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D Note: Shown with optional -SS bezel. Backward compatible+ with Magnehelic® gage. The Series 605 Magnehelic® Differential Pressure Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system. The easily read dial gage is complimented by the two-wire, 4-20 mA control signal utilizing the time-proven Dwyer® Magnehelic® gage mechanical design and Series 600 transmitter technology. The two-wire design with terminal strip on the rear simplifies connection in any 4-20 mA control loop powered by a 10-35 VDC supply. FEATURES/BENEFITS • Easy to read gage permits viewing from far away • Patented design provides quick response to pressure changes means no delay in signaling and alerting to critical situations • Durable and rugged housing and high-quality components combined provides long- service life and minimized down-time • Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to 605 indicating transmitter APPLICATIONS • Monitor pressures in ducts, rooms, or total building pressures • Filter monitoring • Local indication of clean room pressures with process signal sent to control room MODEL CHART Model 605-00N 605-11 605-0 605-1 605-2 605-3 605-6 605-10 605-20 605-30 605-50 Model 605-12 605-13 605-60PA 605-125PA 605-250PA 605-500PA Range in w.c. 0.05-0-0.2 0 to ±.25 0 to .50 0 to 1.0 0 to 2.0 0 to 3.0 0 to 6.0 0 to 10 0 to 20.0 0 to 30 0 to 50 Range in Pa 0 to ±60 0 to ±100 0 to 60 0 to 125 0 to 250 0 to 500 Maximum Pressure 10 psi (68.95 kPa) 10 psi (68.95 kPa) 10 psi (68.95 kPa) 10 psi (68.95 kPa) 2 psi (13.79 kPa) 2 psi (13.79 kPa) 2 psi (13.79 kPa) 2 psi (13.79 kPa) 11 psi (75.8 kPa) 11 psi (75.8 kPa) 11 psi (75.8 kPa) Maximum Pressure 10 psi (68.95 kPa) 10 psi (68.95 kPa) 10 psi (68.95 kPa) 10 psi (68.95 kPa) 10 psi (68.95 kPa) 2 psi (13.79 kPa) Electrical Accuracy ±% 4 2 2 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Electrical Accuracy ±% 4 2 2 2 2 0.5 Mechanical Accuracy ±% 4 3 3 2 2 2 2 2 2 2 2 Mechanical Accuracy ±% 4 2 4 3 2 2 OPTIONS To order add suffix: Description -SS 304 brushed stainless steel bezel. +Backward compatible with standard Magnehelic® gage installation diameter Example: 605-3-SS -NIST Example: 605-3-NIST NIST traceable calibration certificate 64 DWYER INSTRUMENTS, INC. | dwyer-inst.com SPECIFICATIONS GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: See chart. Stability: ±1% FS/yr. Pressure Limits: See chart. Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Process Connections: 1/8˝ female NPT. Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) OD x 2-11/16˝ (68.3 mm); -SS bezel: 4-3/4˝ (120.7 mm) OD x 2-21/32 (67.5 mm). Weight: 1 lb 12.6 oz (811 g). Agency Approvals: CE. TRANSMITTER SPECIFICATIONS Accuracy: See chart (includes linearity, hysteresis, repeatability). Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Compensated Temperature Range: 32 to 120°F (0 to 48.9°C). Thermal Effect: ±0.025% FS/°F (0.045% FS/°C). Power Requirements: 10-35 VDC (2-wire). Output Signal: 4-20 mA. Zero and Span Adjustments: Protected potentiometers. Loop Resistance: DC: 0 to 1250 Ω max. Current Consumption: DC: 38 mA max. Electrical Connections: Screw terminal block. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. ACCESSORIES Model Description A-298 A-370 Flat aluminum bracket for flush mounting Mounting bracket; flush mount Series 605 transmitter in bracket; bracket is then surface mounted; steel with gray hammertone epoxy finish Static Fitting Options: See page 454 (Static Pressure Tips) Process Tubing Options: See page 455 (Gage Tubing Accessories)

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES MS2 MAGNESENSE® II DIFFERENTIAL PRESSURE TRANSMITTER Monitors Pressure, Air Velocity and Air Flow, BACnet or Modbus® Communications YEAR LIMITED WARRANTY Ø3-7/16 [Ø87.31] 21/32 [16.67] 2-41/64 [67.07] 1/2 NPS 21/32 [16.67] 29/32 [23.02] 1/2 [12.70] 57/64 [22.62] Wall mount bracket 2-11/64 [55.17] 2-9/16 [65.09] (3) 3/16 [4.76] HOLES EQUALLY SPACED ON A 4.115 [104.52] BC 3/8 [9.53] Ø3-7/16 [Ø87.31] 2-41/64 [67.24] 1/2 NPS 7-3/4 [196.77] Duct mount bracket 21/32 [16.67] 21/32 [16.67] 29/32 [23.02] 1/2 [12.70] 2-11/64 [55.17] 57/64 [22.62] 1-41/64 [41.71] 25/64 [9.96] DIN mount bracket 3-11/32 [84.84] 3-1/2 [88.90] V I DEO O N L I N E The Series MS2 Magnesense® II Differential Pressure Transmitter combines the proven stable piezo technology and the versatility of our original Series MS with additional features to reduce installation time and simplify ordering. Like the original Series MS, the second generation transmitter can be used as a linear pressure output or a linear velocity output with the square root extraction done in the transmitter. Additional parameters have been included to expand the square root capability to include flow measurements. FEATURES/BENEFITS • Field selectable ranges and output signal reduce inventory and the chances of ordering an incorrect part • BACnet or Modbus® serial communications reduce wiring cost by daisy-chaining the transmitters • Our integral field-upgradeable display or plug-in remote display tool save upfront material cost and allow for local viewing of measurements APPLICATIONS • Filter monitoring in air handler units • Building pressure in pharmaceutical-semi-conductor clean rooms • Duct static pressure in commercial buildings • Air velocity/flow in VAV systems SPECIFICATIONS Supported Baud Rates: 9600, 19200, 38400, 57600, 76800, 115200. Data Size: 8. Parity: None. Stop Bits: 1. Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Typical Accuracy: ±1% FS for 0.15 in w.c. (40 Pa), 0.25 in w.c. (50 Pa), 0.5 in w.c. (125 Pa), 2 in w.c. (500 Pa), 3 in w.c. (750 Pa), 5 in w.c. (1250 Pa), 10 in w.c. (2 kPa), 15 in w.c. (3 kPa), 25 in w.c. (5 kPa), 28 in w.c. (6.975 kPa); ±2% FS for 0.1 in w.c. (25 Pa), 1 in w.c. (250 Pa), and all bi-directional ranges. Stability: ±1% / year FSO. Temperature Limits: 0 to 150°F (-18 to 66°C). Pressure Limits: 1 psi max., operation; 10 psi burst. Power Requirements: 10-35 VDC (2-wire), 17-36 VDC or isolated 21.6-33 VAC (3-wire). Output Signals: 4-20 mA (2-wire), 0-5 VDC, 0-10 VDC (3-wire). Response Time: Adjustable: 0.5 to 15 sec. time constant. Provides a 95% response time of 1.5 to 45 seconds. Zero & Span Adjustments: Digital push-buttons. Loop Resistance: Current output: 0 to 1250 Ω max; Voltage output: Min. load resistance 1 kΩ. Current Consumption: 40 mA max. Display (Optional): 5 digit LCD. Electrical Connections: 3-wire removable European style terminal block for 16 to 22 AWG. Electrical Entry: 1/2˝ NPS thread. Process Connection: 3/16˝ ID tubing (5 mm ID); Max. OD 9 mm. Enclosure Rating: IP66. Mounting Orientation: Not position sensitive. Weight: 8.0 oz (230 g). Agency Approvals: BTL, CE. MODEL CHART Model MS2-W101 MS2-W111 MS2-W102 MS2-W112 MS2-W103 in w.c. 0.10, 0.15, 0.25, 0.50 ±0.10, ±0.15, ±0.25, ±0.50 1, 2, 3, 5 ±1, ±2, ±3, ±5 10, 15, 25, 28 ±10, ±15, ±25, ±28 Pa 25, 40, 50, 125 ±25, ±40, ±50, ±125 250, 500, 750, 1250 ±250, ±500, ±750, ±1250 2500, 3500, 5000, 6975 ±2500, ±3500, ±5000, ±6975 mm w.c. 2.5, 4, 6, 10 ±2.5, ±4, ±6, ±10 25, 50, 75, 125 25, 50, 75, 125 250, 350, 500, 697.5 ±250, ±350, ±500, ±697.5 kPa 0.025, 0.04, 0.05, 0.125 ±0.025, ±0.04, ±0.05, ±0.125 0.25, 0.5, 0.75, 1.25 0.25, 0.5, 0.75, 1.25 2.5, 3.5, 5.0, 6.975 ±2.5, ±3.5, ±5.0, ±6.975 Note: For duct mount static probe change W to D. Example: MS2-D101 For DIN rail mounting change W to N. Example: MS2-N101 Units with display BACnet Communications Modbus® Communications OPTIONS To order add suffix: Description -LCD Example: MS2-W101-LCD -BC Example: MS2-W101-BC -MC Example: MS2-W101-MC -NIST Example: MS2-W101-NIST -FC Example: MS2-W101-FC NIST traceable calibration certificate Factory calibration certificate ACCESSORIES Model A-151 A-MS2-LCD A-435-A A-480 A-481 A-489 A-302F-A SCD-PS Description Cable gland for 5 to 10 mm diameter cable Field upgradeable display Remote display tool Plastic static pressure tip Installer kit; includes 2 plastic static pressure tips and 7 ft (2.1 m) of PVC tubing 4˝ 303 SS straight static pressure tip with flange 4˝ 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber or plastic tubing 100 to 240 VAC/VDC to 24 VDC power supply 66 DWYER INSTRUMENTS, INC. | dwyer-inst.com Modbus® is a registered trademark of Schneider Automation, Inc. Process Tubing Options: See page 455 (Gage Tubing Accessories)

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES AT2MS ATEX/IECEX APPROVED MAGNESENSE® DIFFERENTIAL PRESSURE TRANSMITTER Series MS in Flame-Proof ATEX/IECEx Enclosure 7-7/8 [200.00] 6-1/4 [160.00] 5-3/8 [136.00] 1-5/8 [40.00] 5-1/4 [134.00] 2 [50.00] 1/2 [12.00] 6-1/4 [160.00] The Series AT2MS ATEX/IECEx Approved Magnesense® Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure and air velocity in hazardous areas. This transmitter is loaded with features such as: field selectable English or metric ranges, field upgradeable LCD display, adjustable dampening of output signal and the ability to select a square root output for use with pitot tubes and other similar flow sensors. Along with these features, the magnetic sensing technology provides exceptional long term performance and enables the Magnesense® transmitter to be the solution for a myriad of pressure and flow applications. Flame-proof enclosures are available in aluminum and can include a glass window for viewing process on the LCD. FEATURES/BENEFITS • ATEX/IECEx housing provides all the capabilities and value of the MS2 in a flame & explosion proof enclosure • Durable and rugged housing and high-quality components combined provides long- service life and minimized down-time • High impact strength and high temperature rated for applications where hazardous environments exist APPLICATIONS • Monitor pressures in ducts, rooms, or total building pressures • Filter monitoring • Local indication of clean room pressures with process signal sent to control room • Hazardous area pressure measurement and transmitter Ø3/8 [Ø8.00] 1/8˝ NPT 1 [24.00] 2-1/2 [65.00] SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: MS-X21: 0.5 in w.c. & 0.25 in w.c.: ±1%; 0.1 in w.c.: ±2%; 100 Pa & 50 Pa: ±1%; 25 Pa: ±2%. MS-X11: 5 in w.c. & 2 in w.c.: ±1%; 1 in w.c.: ±2%; 1250 Pa & 500 Pa: ±1%; 250 Pa: ±2% (@ standard conditions). Stability: ±1% FS/year. Temperature Limits: 0 to 150°F (-18 to 66°C) (Note: Product temperature limits differ from case). Pressure Limits: 1 psi max., operation; 10 psi, burst. Power Requirements: 10-35 VDC (2-wire); 17-36 VDC or isolated 21.6-33 VAC (3-wire). Output Signals: 4-20 mA (2-wire); 0-5 V, 0-10 V (3-wire). Response Time: Field adjustable 0.5 to 15 s time constant. Provides a 95% response time of 1.5 to 45 seconds. Zero & Span Adjustments: Digital push-button. In safe zone only. 7-1/8 [182.00] 8-1/8 [205.00] 5/8 [15.00] 1/8˝ NPT Loop Resistance: Current output: 0 to 1250 Ω max.; Voltage output: min. load resistance 1 k Ω. Current Consumption: 40 mA max. Display: 4 digit LCD. Electrical Wiring: 4-20 mA, 2-wire: European style terminal block for 16 to 26 AWG. 0 to 10 V, 3-wire: European style terminal block 16 to 22 AWG. Mounting Orientation: Diaphragm in vertical position. Enclosure Rating: 4X IP66, IP65 with option OPV overpressure relief valve. Housing Material: Aluminum. Finishing: Texture epoxy coat RAL7038. Process Connections: 1/8˝ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS. Electrical Connections: Two 1/2˝ NPT female. Cable gland not included. Weight: 11 lb (5 kg). ATEX Certificate: BVI 14ATEX0072. Agency Approvals: ATEX Compliant 1370 II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C≤Tamb≤+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db. MODEL CHART Example Series Output Range Mounting Display Housing Cover Process Connection Overpressure Plug AT2MS -0 -1 1 -LCD -A O AT2MS 1 X T2 AT2MS-0-11-LCD-AO1XT2 0 1 2 3 6 7 8 9 1 2 3 4 5 1 LCD A B O 1 2 X OPV ATEX/IECEx approved Magnesense® differential pressure transmitter Bidirectional, 4-20 mA Positive range, 4-20 mA Bidirectional, 0-10 VDC Positive range, 0-10 VDC Bidirectional, 0-5 VDC Positive range, 0-5 VDC Bidirectional, 0-5 VDC, 12 volt in Positive range, 0-5 VDC, 12 volt in 1, 2, 5 in w.c. (200, 500, 1000 Pa) .1, .25, .5 in w.c. (25, 50, 100 Pa) 10 in w.c. (2 kPa) 15 in w.c. (3 kPa) 25 in w.c. (5 kPa) Wall With LCD Aluminum Blind Glass top cover 1/8˝ NPT female brass ports 1/8˝ NPT female SS ports Standard without overpressure relief valve Overpressure relief valve Material same as ports Tag *Add on applies to range -2 only. T2 SS information label 68 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES 3100 | MERCOID® BY DWYER EXPLOSION-PROOF DIFFERENTIAL PRESSURE TRANSMITTER HART®, Push-Button Configuration, Rangeability (100:1) 3-25/64 [86.00] 4-13/32 [112.00] 7-37/64 [192.50] 1-21/32 [42.00] 2X DRAIN VALVE 1/4˝ NPT PROCESS CONNECTION 2-1/8 [54.00] 4X 7/16-20 UNF FOR MOUNTING V I DEO O N L I N E 3100D 3100D Mercoid® Series 3100 Explosion-Proof Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push-button configuration, and programmable using HART® Communication. The Series 3100 is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3100 is FM or ATEX approved for use in hazardous (classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application. FEATURES/BENEFITS • Configurable using zero/span buttons means no calibrator required reducing time to install and running • Range-ability and selectable engineering units, allows transmitter to fit many applications reducing the number of different transmitters to meet specifications • High accuracy (±0.075%) provides exceptional measurement for ensuring tight- control and minimizing costly out of specification conditions • Automatic sensor temperature compensation improves performance of device for accurate measurement under different operating environments • Fail-mode process function stores configuration settings in the event of shutdown or power-loss provides for faster restart to getting application back on-line • A HART® Communication programmable device provides a reliable, long-term solution for plant operators who seek the benefits of intelligent devices with digital communication SPECIFICATIONS Service: Compatible gases, steam, liquids or vapors. Wetted Materials: 316L SS, fluoroelastomer. Accuracy: ±0.075% FS (@ 20°C). Rangeability: 100:1 turn down. Stability: ±0.125% FSO/yr. Temperature Limits: Process: -40 to 248°F (-40 to 120°C); Ambient: Without LCD: -40 to 185°F (-40 to 85°C); With LCD: -22 to 176°F (-30 to 80°C). Pressure Limits: Max pressure: Range: -14.5 to 2000 psi; Burst pressure: 10000 psi. Thermal Effect: ±0.125% span/32°C. Power Requirements: 11.9-45 VDC. Output Signal: 4-20 mA / HART® Communication. Response Time: 0.12 s. Damping Time: 0.25 to 60 s. Loop Resistance: Operation: 0 to 1500 Ω; HART® Communication: 250 to 500 Ω. Electrical Connection: Two 1/2˝ female NPT conduit, screw terminal. Process Connection: 1/4˝ female NPT. Display: Optional 5 digit LCD. Enclosure Rating: NEMA 4X (IP66) and explosion-proof for Class I, Div I, Groups A, B, C and D. Weight: 8.6 lb (3.9 kg). Agency Approvals: CE, FM, ATEX option available (consult factory). APPLICATIONS • Flow measurement • Level monitoring • Filter or pump differential pressure • Critical process monitoring MODEL CHART Model 3100D-2-FM-1-1 3100D-3-FM-1-1 3100D-4-FM-1-1 3100D-5-FM-1-1 3100D-6-FM-1-1 3100D-2-FM-1-1-LCD 3100D-3-FM-1-1-LCD 3100D-4-FM-1-1-LCD 3100D-5-FM-1-1-LCD 3100D-6-FM-1-1-LCD Note: Consult factory for custom calibration. Calibrated Span (Min. to Max.) 0.6 to 30 in w.c. 1.5 to 150 in w.c. 7.5 to 750 in w.c. 1 to 100 psi 3 to 300 psi 0.6 to 30 in w.c. 1.5 to 150 in w.c. 7.5 to 750 in w.c. 1 to 100 psi 3 to 300 psi 0.15 to 7.5 kPa 0.373 to 37.3 kPa 1.865 to 186.5 kPa 6.9 to 690 kPa 20.68 to 2068 kPa 0.15 to 7.5 kPa 0.373 to 37.3 kPa 1.865 to 186.5 kPa 6.9 to 690 kPa 20.68 to 2068 kPa Lower Range Limit -7.5 kPa -30 in w.c. -37.3 kPa -150 in w.c. -750 in w.c. -186.5 kPa -690 kPa -100 psi -2068 kPa -300 psi -7.5 kPa -30 in w.c. -37.3 kPa -150 in w.c. -186.5 kPa -750 in w.c. -690 kPa -100 psi -300 psi -2068 kPa Upper Range Limit 7.5 kPa 30 in w.c. 37.3 kPa 150 in w.c. 750 in w.c. 186.5 kPa 690 kPa 100 psi 2068 kPa 300 psi 7.5 kPa 30 in w.c. 37.3 kPa 150 in w.c. 186.5 kPa 750 in w.c. 690 kPa 100 psi 300 psi 2068 kPa LCD Display No No No No No Yes Yes Yes Yes Yes 70 DWYER INSTRUMENTS, INC. | dwyer-inst.com HART® is a registered trademark of Hart Communication Foundation

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES 3500 SMART DIFFERENTIAL PRESSURE TRANSMITTER HART® Communication , Push Button Configuration, Rangeability (Up to 25:1) 5-1/4 [132] 5-1/4 [133] 3-5/8 [91.5] 4 [102] 2 X M6 1/4˝ FEMALE NPT PROCESS CONNECTIONS SPECIFICATIONS Service: Compatible gases, steam, liquids or vapors. Wetted Materials: 316L SS and FPM; with diaphragm seal: 316L SS. Accuracy: ±0.075% FS (@ 20°C). Rangeability: Up to 25:1 turn down. Stability: ≤0.075% FSO/3 years. Temperature Limits: Ambient: -40 to 185°F (-40 to 85°C); Process with -DS: -40 to 400°F (-40 to 204°C). Thermal Effect: < ±0.05% span/10°C. Power Requirements: 10-55 VDC. Output Signal: 4-20 mA. Response Time: 16 to 480 ms (programmable). Damping Time: 0 to 60 seconds. Electrical Connection: Packing gland M20x1.5, two 1/2˝ female NPT conduit, screw terminal. Process Connections: 1/4˝ female NPT. Enclosure Rating: NEMA 4X IP66/IP67. Agency Approvals: CE; -IS, -FP suffix: ATEX Compliant ia/db IIC T6/T5 Gb Ta<80°C, T5 / II 2D Ex ia/tb IIIC T85°C/T100°C Db. Type Certificate No. KDB 17ATEX0056X. ATEX Standards: EN 60079-0:2012+A11:2013, EN 60079-1:2014, EN 60079-11:2012, EN 60079-26:2015, EN 60079-31:2014 IECEx Compliant: Ex ia/db IIC T6/T5 Gb / Ex ia/tb IIIC T85°C/T100° Db. Certificate of Conformity IECEx KDB 17.0008X. IECEx Standards: IEC 60079-0:2011, IEC 60079-1:2014-06, IEC 60079-11:2011, IEC 60079-26:2006, IEC 60079-31:2013. 0518 II 2G V I DEO O N L I N E The Series 3500 Smart Differential Pressure Transmitter is a microprocessor- based high performance transmitter, which has flexible pressure calibration, push button configuration, and is programmable using HART® Communication. The Series 3500 is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3500 can be configured to be ATEX or IECEX approved for use in hazardous (classified) locations. The rangeability allows the smart transmitter to be configured to fit any application. FEATURES/BENEFITS • High accuracy (±0.075% FS) • Rangeability (up to 25:1) • Configurable using zero/span buttons (no calibrator required) • Fail-mode process function • Automatic ambient temperature compensation APPLICATIONS • Flow measurement • Level monitoring • Filter or pump differential pressure • Critical process monitoring MODEL CHART Model 3500-AL-02-NF-2 3500-AL-04-NF-2 3500-AL-08-NF-2 3500-AL-10-NF-2 3500-AL-15-NF-2 3500-AL-20-NF-2 3500-AL-25-NF-2 Note: Bar ranges are also available. Range -10 to 10 in w.c. 0 to 30 in w.c. 0 to 100 in w.c. -200 to 200 in w.c. 0 to 1000 in w.c. 0 to 15 psi 0 to 100 psi 72 DWYER INSTRUMENTS, INC. | dwyer-inst.com HART® is a registered trademark of Hart Communication Foundation

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES 608 INTRINSICALLY SAFE DIFFERENTIAL PRESSURE TRANSMITTER Ranges Down to 0.1 in w.c., FM Approved, NEMA 4X 1/4 [6.35] 4-1/2 [107.95] 2-11/16 [68.26] 3 [76.20] 5/8 [15.88] 3-1/4 [82.55] 5-1/32 [127.79] 1-1/2 [38.10] 1/2 NPT TYP 2 PLACES 1/4 NPT TYP 2 PLACES The Dwyer Series 608 Intrinsically Safe Differential Pressure Transmitter converts positive, negative (vacuum), or differential pressures of clean, dry air or other non- conductive, non-corrosive gases into a standard two wire, 4 to 20 mA output signal. The use of an ultra-thin silicon diaphragm enables precision measurement of differential pressures as low as 0.1 in w.c. while withstanding high static working pressures up to 100 psig (6.89 bar). The Series 608 transmitters are FM approved intrinsically safe for use in the specified hazardous locations when used with an approved intrinsic safety barrier. The rugged NEMA 4X, stainless steel housing makes this transmitter ideal for use in industrial and process plant environments. FEATURES/BENEFITS • High accuracy at low pressure ranges provides exceptional measurement for ensuring tight-control and minimizing costly out of specification conditions • Intrinsically safe for use in the specified hazardous locations meets specifications where pressure transmission and safety cannot be compromised • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists APPLICATIONS • Lab fume hood control • Clean room applications • Flow measurements and control • Filter monitoring • Furnace draft measurement • Process control MODEL CHART Model 608-02 608-03 608-04 608-05 608-06 608-07 608-01B 608-13B* 608-04B *Models have a ±0.25% FS accuracy. Range (in w.c.) 0 to 0.5 0 to 1.0 0 to 2.0 0 to 5.0 0 to 10.0 0 to 25.0 0 to ±0.25 0 to ±1.0 0 to ±2.0 SPECIFICATIONS Service: Clean/dry air and compatible, combustible gases. (see Agency Approvals for FM ratings). Wetted Materials: Consult factory. Accuracy: ±0.5% or ±0.25% full-scale. Stability: ±0.5% FS/year. Pressure Limits: 100 psig (6.89 bar); 15 psid (1.03 bar). Temperature Limits: -20 to 185°F (-28 to 85°C). Compensated Temperature Range: 0 to 160°F (-18 to 71°C). Thermal Effect: 0.5% Accuracy: ±0.02% FS/°F; 0.25% Accuracy: ±0.01% FS/°F. Power Requirements: 12 to 36 VDC (2-wire). Output Signal: 4 to 20 mA DC. Zero and Span Adjustments: Potentiometers for zero and span. Response Time: 250 ms. Loop Resistance: DC: 0 to 1045 Ω max. Electrical Connections: Screw terminal: Two 1/2˝ female NPT conduit. Process Connections: Two 1/4˝ female NPT. Enclosure Rating: NEMA 4X (IP66). Weight: 2 lb (0.9 kg). Agency Approvals: FM approved intrinsically safe for use in Class I, Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; Class III, Div. 1 when wired with approved intrinsically safe barrier. Entity parameters: Vmax= 36 VDC; Imax= 250 mA; CI=12 nF; LI=0 mH. OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate ACCESSORIES Model MTL5541 MTL7706 Description Intrinsically safe galvanic isolator Intrinsically safe zener barrier 74 DWYER INSTRUMENTS, INC. | www.dwyer-inst.com Static Fitting Options: See page 454 (Static Pressure Tips) Process Tubing Options: See page 455 (Gage Tubing Accessories)

® SERIES 629C WET/WET DIFFERENTIAL PRESSURE TRANSMITTERS 0.5% Accuracy, NEMA 4X (IP66) Enclosure 43/64 [17.15] YEAR LIMITED WARRANTY 1-11/32 [34.29] 3-7/64 [78.83] 1-27/64 [35.98] Conduit housing with remote sensor available in 10´ or 20´ shielded or armored cable 629C-RS option V I DEO O N L I N E The Series 629C Wet/Wet Differential Pressure Transmitters monitor differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4-20 mA output signal or field selectable voltage. Small internal volume and minimal moving parts result in exceptional response and reliability. The terminal block, as well as a zero adjustment button, are easily accessed under the top cover. The Series 629C Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction. FEATURES/BENEFITS • Powered by either DC or AC - take advantage of most readily available power source reducing installation costs • Optional LCD does not need a separate power supply - lowers installed cost • Selectable voltage range - provides flexible choice for changing design or inputs for process/HVAC controllers being used to monitor and control • Push-button zero (versus trim pot) - more simple zeroing provides easy install and calibration reducing installation time and possibility of operator error • Optional LCD indicator provides local status to identify operational condition • Remote sensor option reduces installation labor and material APPLICATIONS • Flow elements • Heat exchangers • Filters • Coils • Chiller • Pumps 3-7/64 [78.83] 5-15/16 [150.88] 1/4 NPT FEMALE FITTING 1-31/32 [50.16] OPTIONAL LCD 7 [177.80] OPTIONAL 1/4 NPT MALE FITTING SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Without valve: 316, 316L SS. Additional wetted parts with valve option: Buna-N, silicone grease, PTFE, brass 360, copper, and reinforced copolymer. Accuracy: ±0.5% FS (includes linearity, hysteresis & repeatability). Stability: ±1% FS/year. Temperature Limits: 0 to 200°F (-18 to 93°C). Compensated Temperature Limits: 0 to 175°F (-18 to 79°C). Pressure Limits: See Table 1. Thermal Effects: Avg 0.04%/°F (0.072%/°C) (includes zero and span). Power Requirements: 2-wire: 10-35 VDC; 3-wire: 13-35 VDC or isolated 16- 33 VAC (reverse polarity protected). Output Signal: 2-wire: 4-20 mA; 3-wire: Field selectable 0-5, 1-5, 0-10, or 2-10 VDC. Zero and Units: Push-buttons inside conduit enclosure. Response Time: 400 msec. Loop Resistance: Current output: 0 to 1250 Ω (max), Rmax = 50(Vps-10); Voltage output: Minimum load resistance = 5 kΩ. Current Consumption: 28 mA (max). Electrical Connections: Removable terminal block; 1/2˝ female NPT conduit. Process Connections: 1/4˝ female or male NPT. Display: Optional 4-1/2 digit LCD field attachable display. Enclosure Rating: Designed to meet NEMA 4X. Mounting Orientation: Not position sensitive. Weight: 629C-XX-CH: 10.1 oz (286 g); 629C-XX-R2-P1-E5-XX: 2.3 lbs (1.04 kg); 629C-XX-R6-P1-E5-XX: 4.55 lbs (2.06 kg). Agency Approvals: CE. E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D MODEL CHART Example Series Range 629C -01 -CH -P1 -E1 -S1 -3V 629C-01-CH-P1-E1-S1-3V 629C 01 02 03 04 05 06 07 08 09 11 12 13 14 15 16 17 18 19 CH R1 R2 R5 R6 P1 P2 P3 P4 E1 E2 E3 E5 E9 S1 S3 3V AT FC LCD NIST Wet/wet differential pressure transmitter 0 to 5 psid 0 to 10 psid 0 to 25 psid 0 to 50 psid 0 to 100 psid 0 to 150 psid 0 to 200 psid 0 to 300 psid 0 to 500 psid 0 to 0.5 bar differential 0 to 1 bar differential 0 to 2 bar differential 0 to 4 bar differential 0 to 6 bar differential 0 to 10 bar differential 0 to 15 bar differential 0 to 20 bar differential 0 to 30 bar differential Conduit housing, NEMA 4X (IP66) Conduit housing, NEMA 4X (IP66) with Remote Sensor and 10´ shielded cable Conduit housing, NEMA 4X (IP66) with Remote Sensor and 20´ shielded cable Conduit housing, NEMA 4X (IP66) with Remote Sensor and 10´ armored cable Conduit housing, NEMA 4X (IP66) with Remote Sensor and 20´ armored cable 1/4˝ male NPT 1/4˝ female NPT 1/4˝ male BSPT 1/4˝ female BSPT Cable gland with 3´ of prewired cable Cable gland with 6´ of prewired cable Cable gland with 9´ of prewired cable 1/2˝ female NPT conduit M-12 4 pin connector 4-20 mA Field selectable 0-5, 1-5, 0-10, 2-10 VDC 3-way valve Aluminum tag Factory calibration certificate LCD indication NIST traceable certificate Housing Process Connection Electrical Connection Signal Output Options Note: -3V option is only available with -P2 process connection. 76 DWYER INSTRUMENTS, INC. | dwyer-inst.com RANGE Range Number Range 01 02 03 04 05 06 07 08 09 11 12 13 14 15 16 17 18 19 *Pressures exceeding the working pressure limit may cause a calibration shift of up to ±3% of full-scale. Note: Over pressure of all models with 3-way valve is 100 psi. 0 to 5 psid 0 to 10 psid 0 to 25 psid 0 to 50 psid 0 to 100 psid 0 to 150 psid 0 to 200 psid 0 to 300 psid 0 to 500 psid 0 to 0.5 bar differential 0 to 1 bar differential 0 to 2 bar differential 0 to 4 bar differential 0 to 6 bar differential 0 to 10 bar differential 0 to 15 bar differential 0 to 20 bar differential 0 to 30 bar differential Working Pressure* 10 psi 20 psi 50 psi 100 psi 200 psi 300 psi 400 psi 600 psi 1000 psi 1 bar 2 bar 4 bar 8 bar 12 bar 20 bar 30 bar 40 bar 60 bar Over Pressure 50 psi 50 psi 120 psi 250 psi 500 psi 750 psi 1000 psi 1200 psi 2000 psi 3 bar 8 bar 8 bar 18 bar 18 bar 50 bar 60 bar 80 bar 120 bar ACCESSORIES Model A-155 A-228 A-62X-LCD BBV-1B Description Cable gland with 1/2˝ NPT male 12˝ SS flex hose Field-upgradeable LCD Mini SS 3-valve block manifold USA: California Proposition 65 WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES 647 WET/WET DIFFERENTIAL PRESSURE TRANSMITTER ±1.0% Accuracy, NEMA 4 (IP56) Enclosure, 2-Wire [4] 1/4 [6.35] LONG X 7/32 [5.56] WIDE MOUNTING HOLES 1-1/16 [26.97] TYP 5 [127.00] 2-1/2 [63.50] 3-5/16 [84.15] 1-1/8 [28.58] 2-7/8 [73.03] 2-15/16 [74.63] 1/8 FEMALE NPT HIGH PRESSURE CONNECTION 5-9/16 [141.30] 1-17/64 [32.15] 1/8 FEMALE NPT LOW PRESSURE CONNECTION Ø7/8 [22.23] CONDUIT CONNECTION SPECIFICATIONS Service: Compatible gases or liquids on both pressure and reference sides. Wetted Materials: Brass, vinyl, glass-filled polyester, silicon, and fluorosilicone. Accuracy: ±1.0% FS. Stability: ±1.5% FS output/year. Temperature Limits: 32 to 122°F (0 to 50°C). Pressure Limits: Ranges 1 in w.c. to 5 psi: 20 psi, 15 psi range: 45 psi, 30 psi range: 60 psi. Thermal Effects: Zero: ±0.05% FS/°F, Span: ±0.05% rdg/°F. Power Requirements: 18-30 VDC. Output Signal: 4-20 mA, 2-wire. Zero and Span Adjustments: Adjustable, ±10%. Loop Resistance: 400Ω @ 18 VDC, 600Ω @ 24 VDC, 1000Ω @ 30 VDC. Electrical Connection: Screw terminals, reverse polarity protected. Process Connections: Two 1/8˝ female NPT. Housing: Gasketed steel epoxy painted, NEMA 4 (IP56). Weight: 14 oz (397 g). Monitor differential pressure in air/liquid flow systems, HVAC automation, pneumatic systems and process control with the Series 647 Wet/Wet Differential Pressure Transmitter. Units are temperature compensated and provide a 4-20 mA output signal which can be interfaced with chart recorders, data loggers and computerized monitoring and control systems. FEATURES/BENEFITS • Versatile for liquid or gas supports designs requiring more precise measurements in support of application • Temperature compensated improves performance of device for accurate measurement under different operating environments. • Output signal provides capability to interface with automation systems to centralize monitoring APPLICATIONS • Flow • HVAC automation • Process control • Pneumatic systems MODEL CHART Model Range 647-0 647-1 647-2 647-3 647-4 0 to 1 in w.c. 0 to 3 in w.c. 0 to 25 in w.c. 0 to 5 in w.c. 0 to 10 in w.c. OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate 78 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

E R U S S E R P s r e t t i m s n a r T e r u s s e r P l a i t n e r e f f i D ® SERIES WWDP DIFFERENTIAL PRESSURE TRANSMITTER Selectable Ranges of Uni-Directional or Bi-Directional, Selectable Outputs 6 [152.4] 5-9/16 [141.29] 2 [50.5] 5-11/64 [131.37] 1/8˝ NPT 1-9/16 [39.69] 1/2˝ CONDUIT OPENING 61/64 [24.21] R7/64 [R2.78] 11/32 [8.73] 2 [50.8] 1-43/64 [42.47] 1-15/64 [31.35] 4-39/64 [117.08] 4 [101.6] 4-53/64 [122.63] SPECIFICATIONS Service: Gases or liquids compatible with 17-4 PH stainless steel. Accuracy: All pressure ranges have ±1% full-scale accuracy except the lowest selectable range of each unit is ±2% full-scale. Stability: ±0.5% per year. Temperature Limits: Compensated temperature range: 32 to 130°F (0 to 54°C); Operating temperature range: -4 to 185°F (-20 to 85°C). Pressure Limits: Max working pressure: WWDP-1: 50 psi; WWDP-2: 100 psi; WWDP-3: 250 psi; Proof pressure: 2.2X of full-scale; Burst pressure: 40X of full- scale. Thermal Effect: 2% FS/100°F (50°C) includes zero and span. Power Requirements: 12-30 VDC/18-28 VAC (reverse excitation protected). Note: 4-20 mA output cannot be powered with AC voltage. Output Signal: Selectable 0-5, 0-10 and 1-5 VDC; 4-20 mA. Zero & Span: Digital “re” zero button (should be used when changing ranges). Span can be adjusted by changing between field selectable ranges. Response Time: 1 to 5 s (selectable). Loop Resistance: 1000 Ω. Current Consumption: VDC power: 0-5, 1-5 VDC output 4 mA (typ); 0-10 VDC output 5 mA (typ); 4-20 mA output 20 mA max. Current consumption will equal the transmitter output in current mode. VAC power: 0-5, 1-5, 0-10 VDC output 40 mA (typ). Electrical Connections: 1/2˝ conduit. Process Connections: 1/8˝ female NPT internal. Enclosure Rating: Designed to meet NEMA 4 (IP56). Mounting Orientation: Vertical; mount the pressure ports down (keeps debris from building up inside the pressure port). Weight: 1.5 lb (680.4 g). Agency Approvals: CE. The Series WWDP Differential Pressure Transmitter offers everything in one package by having 30 field selectable variations in just 3 models. The WWDP provides field selectable unidirectional and bidirectional pressure ranges, configurable 0-5, 1-5, 0-10 VDC, and 4 to 20 mA output. It also provides an auto-zero capability. The field selectable port swap feature eliminates costly re-plumbing if the unit is improperly installed or if the transmitter is simply replaced. An optional LCD display is available for on-sight indication of line and differential pressure. The all cast aluminum housing is rated NEMA 4 (IP66). These features make the WWDP transmitter an ideal instrument for measuring the flow of various liquids and gases, pressure drop across filters, measurement of liquid level or pressurized vessels, and for use in energy management and process control systems. FEATURES/BENEFITS • Versatile device for liquid or gas supports designs requiring more precise measurements in support of application • Field selectable port swap eliminates costly re-plumbing if unit is re-installed or replaced • Uni-directional and bi-directional pressure selection with configurable output provides a single device that can meet broad application needs without having to specify multiple devices • Optional LCD display provides local status to identify operational conditions • NEMA 4 rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists APPLICATIONS • Chiller monitoring • Pressure vessels • Filter monitoring • Process control • Energy management • Liquid level MODEL CHART Model WWDP-1 WWDP-2 WWDP-3 WWDP-1-LCD WWDP-2-LCD WWDP-3-LCD Description (psid) Selectable 5, 10, 25, 50 Selectable 10, 20, 50,100 Selectable 25, 50,125, 250 Selectable 5, 10, 25, 50 Selectable 10, 20, 50,100 Selectable 25, 50,125, 250 Max. Working Pressure (psi) 50 100 250 50 100 250 OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate 80 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES LPG4 2.5˝ LOW PRESSURE GAGE 1.5% Full-Scale Accuracy in a 2.5” Gage E R U S S E R P 1.500 [38] ø2.625 [67.7] .550 SQUARE [14.0] [1/4 - 18NPT] BOTTOM CONNECTED .850 [21.6] Our Series LPG4 2.5˝ Low Pressure Gage offers top of the line performance and accuracy for pressure and vacuum applications up to and including 160 in w.c. The LPG4 is constructed from a single beryllium-copper diaphragm affixed to a precision- machined brass plate. This innovative design, together with a high-precision, milled- teeth brass movement and nickel-silver pinion and bearing surface, provide the user with a top of the line low pressure instrument. FEATURES/BENEFITS • Low pressure gage provides a selection to meet specific applications • Specified with high ambient and process temperature ratings mean more robust uses and longer service-life • High accuracy gage for applications requiring more precise measurement is a concern SPECIFICATIONS Service: Compatible gases & liquids. Wetted Materials: Brass and beryllium copper. Housing: Drawn steel, black finish. Lens: Polycarbonate (removable). Accuracy: ±1.5% FS. Pressure Limit: 100% of range scale. Temperature Limits: Process: -40 to 160°F (-40 to 70°C); Ambient: -40 to 140°F (-40 to 60°C). Size: 2.5˝ (63 mm). Process Connections: 1/4˝ male NPT. Enclosure Rating: NEMA 3 (IP54). Weight: 7.3 oz (0.21 kg). APPLICATIONS • Air flow indication • Liquid level • Draft measurement l i a D , s e g a G e r u s s e r P e g n S i l MODEL CHART Model LPG4-D7122N LPG4-D7222N LPG4-D7322N LPG4-D7422N LPG4-D7522N LPG4-D7622N LPG4-D7722N LPG4-D7822N LPG4-D7922N LPG4-D8022N LPG4-D8122N LPG4-D8222N Range -10 to 0 in w.c. (-2.5 to 0 kPa) -15 to 0 in w.c. (-4 to 0 kPa) -25 to 0 in w.c. (-6 to 0 kPa) -40 to 0 in w.c. (-10 to 0 kPa) -60 to 0 in w.c. (-15 to 0 kPa) -80 to 0 in w.c. (-20 to 0 kPa) -100 to 0 in w.c. (-25 to 0 kPa) -160 to 0 in w.c. (-40 to 0 kPa) -235 to 0 in w.c. (-60 to 0 kPa) 0 to 10 in w.c. (0 to 2.5 kPa) 0 to 15 in w.c. (0 to 3.75 kPa) 0 to 25 in w.c. (0 to 6 kPa) Model LPG4-D8322N LPG4-D8422N LPG4-D8522N LPG4-D8622N LPG4-D8722N LPG4-D8922N LPG4-D9022N LPG4-D9122N LPG4-D9222N LPG4-D9322N LPG4-D9422N LPG4-D9522N Range 0 to 40 in w.c. (0 to 10 kPa) 0 to 60 in w.c. (0 to 15 kPa) 0 to 80 in w.c. (0 to 20 kPa) 0 to 100 in w.c. (0 to 25 kPa) 0 to 160 in w.c. (0 to 40 kPa) -4 to 0 to 6 in w.c. (-1 to 0 to 1.5 kPa) -6 to 0 to 10 in w.c. (-1.5 to 0 to 2.5 kPa) -8 to 0 to 16 in w.c. (-2 to 0 to 4 kPa) -16 to 0 to 24 in w.c. (-4 to 0 to 6 kPa) -24 to 0 to 40 in w.c. (-6 to 0 to 10 kPa) -30 to 0 to 50 in w.c. (-7.5 to 0 to 12.5 kPa) -40 to 0 to 60 in w.c. (-10 to 0 to 15.0 kPa) OPTIONS Use order code: Description NISTCAL-PG1 NIST traceable calibration certificate 82 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

E R U S S E R P l a t i g D i , s e g a G e r u s s e r P e g n S i l ® SERIES DPGA/DPGW/DPGWB/DPGAB 0.5% & 1% DIGITAL PRESSURE GAGES Economic Gage With Selectable Engineering Units, Rubber Boot 3-11/16 [93.66] DPGA DPGW ø2-43/64 [67.87] 1-1/2 [38.10] DPGA & DPGW 1/4 NPT 3-59/64 [99.62] DPGAB DPGWB DPGAB & DPGWB ø3-3/32 [78.58] 1/4 NPT 1-25/32 [45.24] The Series DPGA 1% Digital Pressure Gage is the only economic digital pressure gage with selectable engineering units on the market. With its 1% accuracy and digital push-button zero, the DPGA is the perfect choice for digitally monitoring the pressures of air and compatible gases. The Series DPGW 1% Digital Pressure Gage is the only economic digital pressure gage for liquids with the ability to select engineering units on the market. With its 1% accuracy and digital push-button zero, the DPGW is the perfect choice for digitally monitoring the pressures of air and compatible liquids and gases. The Series DPGWB/DPGAB 0.5% Digital Pressure Gage offers full-scale accuracy in a rugged, easy-to-use unit at prices comparable to mechanical gages. The DPGWB stainless steel wetted material makes it suitable for a wide variety of liquids or gases. The gages feature user-selectable units of measure allowing one gage to be used for a variety of pressure scales. The DPGWB/DPGAB come with a protective rubber boot to protect against short drops and rough handling. FEATURES/BENEFITS • Push-button zero reduce installation and service time • High accuracy provides exceptional measurement for minimizing costly out of specification conditions • Selectable unit button provides reading in easily recognizable units • Well-suited gage for compatible gas (DPGA) or liquid (DPGW) applications specifying simple operation and accuracy APPLICATIONS • Process applications • Process start-up • OEM applications MODEL CHART SPECIFICATIONS Service: DPGA & DPGAB: Air and compatible gases; DPGW & DPGWB: Liquids and compatible gases. Wetted Materials: DPGA & DPGAB: 316L SS, silicone sensor; DPGW & DPGWB: 316L SS. Housing Materials: ABS plastic. Accuracy: DPGA & DPGW: ±1.0% FS (includes linearity, hysteresis, repeatability); DPGAB & DPGWB: ±0.5% FS (includes linearity, hysteresis, repeatability). ACCESSORIES Model Description A-293 Protective rubber boot Pressure Limits: 2X pressure range. Vacuum range max. pressure is 30 psig. Temperature Limits: 30 to 120°F (-1 to 49°C). Thermal Effect: 0.05% FS/°F. Size: 2.62˝ OD x 1.52˝ deep. Process Connections: 1/4˝ male NPT. Display: 4-digit LCD (.425˝ H x .234˝ W digits). Power Requirements: 9 V alkaline battery, included, user replaceable. Auto Shut-off: 20 minute auto shut-off. Weight: 5.6 oz (160 g). OPTIONS To order add suffix: Description -NIST Example: DPGA-04-NIST, DPGAB-04-NIST NIST traceable calibration certificate Pressure Ranges Resolution Model DPGA-00 DPGA-04 DPGA-05 DPGA-06 DPGA-07 DPGA-08 DPGA-09 DPGA-10 DPGA-11 Compound range available: DPGW-12: 30˝ Hg-0-100 psi. Range 30˝ Hg to 0 (psi) 0 to 5 psi 0 to 15 psi 0 to 30 psi 0 to 50 psi 0 to 100 psi 0 to 200 psi 0 to 300 psi 0 to 500 psi Model DPGW-00 DPGW-04 DPGW-05 DPGW-06 DPGW-07 DPGW-08 DPGW-09 DPGW-10 DPGW-11 psig -14.70 5.000 15.00 30.00 50.00 100.0 200.0 300.0 500.0 kg/cm2 bar -1.033 .3515 1.055 2.109 3.515 7.03 14.06 21.09 35.15 -1.013 .3447 1.034 2.068 3.447 6.89 13.79 20.68 34.47 MODEL CHART Pressure Ranges kg/cm2 bar Model DPGAB-00 -1.033 DPGAB-04 .3515 DPGAB-05 1.055 DPGAB-06 2.109 DPGAB-07 3.515 DPGAB-08 7.03 DPGAB-09 14.06 DPGAB-10 21.09 DPGAB-11 35.15 Compound range available: DPGWB-12: 30˝ Hg-0-100 psi Range 30˝ Hg to 0 (psi) 0 to 5 psi 0 to 15 psi 0 to 30 psi 0 to 50 psi 0 to 100 psi 0 to 200 psi 0 to 300 psi 0 to 500 psi Model DPGWB-00 DPGWB-04 DPGWB-05 DPGWB-06 DPGWB-07 DPGWB-08 DPGWB-09 DPGWB-10 DPGWB-11 psig -14.70 5.000 15.00 30.00 50.00 100.0 200.0 300.0 500.0 -1.013 .3447 1.034 2.068 3.447 6.89 13.79 20.68 34.47 84 DWYER INSTRUMENTS, INC. | dwyer-inst.com in Hg ft w.c. kPa -29.93 10.18 30.54 61.1 101.8 203.6 407.2 611 1018 -33.94 11.53 34.60 69.2 115.3 230.7 461.3 692 1153 -101.4 34.47 103.4 206.8 344.7 689 1379 2068 3447 in Hg ft w.c. kPa -29.93 10.18 30.54 61.1 101.8 203.6 407.2 611 1018 -33.94 11.53 34.60 69.2 115.3 230.7 461.3 692 1153 -101.4 34.47 103.4 206.8 344.7 689 1379 2068 3447 oz/in2 -235.2 80.0 240.0 480.0 800 1600 3200 4800 - oz/in2 -235.2 80.0 240.0 480.0 800 1600 3200 4800 - in w.c. mbar cm w.c. mm Hg psi -407.3 138.4 415.2 830 1384 2768 - - - -1013 344.7 1034 2068 3447 - - - - -1034 351.5 1055 2109 3515 - - - - -761 258.6 776 1551 2586 - - - - 0.01 0.002 0.01 0.01 0.02 0.1 0.1 0.1 0.2 Resolution in w.c. mbar cm w.c. mm Hg psi -407.3 138.4 415.2 830 1384 2768 - - - -1013 344.7 1034 2068 3447 - - - - -1034 351.5 1055 2109 3515 - - - - -761 258.6 776 1551 2586 - - - - 0.01 0.002 0.01 0.01 0.02 0.1 0.1 0.1 0.2

E R U S S E R P l a t i g D i , s e g a G e r u s s e r P e g n S i l ® SERIES DCGII DIGITAL CALIBRATION PRESSURE GAGE ±0.05% FS Accuracy, 316 SS Wetted Parts V I DEO O N L I N E Ø3-5/8 [92.20] Ø4-3/8 [111.51] 2-5/8 [66.97] 1/2 NPT The Series DCGII Digital Calibration Pressure Gage offers a complete pressure gage with calibration capabilities. With a precise 0.05% full-scale accuracy and large 5 digit resolution, this gage can be used in critical industrial applications where precision is most important. This versatile gage only requires one 9V battery or power adapter and can operate up to 5,000 working hours. The Series DCGII 0.05% Digital Pressure Gage can display percent of range, pressure swings or alarm set points. This pressure gage comes complete with eleven selectable pressure units, backlight and zeroing capability. FEATURES/BENEFITS • Highest accuracy provides exceptional measurement for calibration minimizing costly out of specification conditions • Stainless steel housing resists ambient corrosion for longer service life in harsh environments • Lightweight and slim, yet large easy to read battery-powered gage make them easy to carry and read • Specified with high ambient temperature rating means more robust uses and longer service-life • Indicator can display pressure swings, minimum and maximum peak detection with alarm set points provides a multipurpose tool where critical calibration is needed SPECIFICATIONS Service: Compatible, non-combustible liquids and gases. Wetted Materials: 316 SS. Other Materials: Housing: Aluminum alloy; Display: Acrylic MR200; Buttons: Silicon gel; Back plate: 304 SS; Back seal: Oil-proof latex. Accuracy: 0.05% FS; ±1 least significant digit. Temperature Accuracy: ±1°C. Pressure Limits: 120% FS. Temperature Limits: 14 to 122°F (-10 to 50°C). Compensated Limits: 32 to 122°F (0 to 50°C). Process Connection: 1/2˝ male NPT. Display: 5-digit LCD with blue backlight. Power Requirements: 9 V alkaline battery, not included, or power adapter accessory. Battery Life: Up to 10,000 hours (600 working hours @ default 3 times/s). Auto Shut-Off: Backlight: On/off, 10 s, 20 s, 30 s. Weight: 1.28 lb (0.58 kg). Agency Approvals: CE. APPLICATIONS • Field gage calibration • Permanent installation • Burst disc testing • Torque data logging • Pressure regulator testing and hydrostatic leak testing MODEL CHART Model Range (psig) kPa mPa kgf/cm2 in H2O in Hg mm Hg psi mbar bar DCGII-100 DCGII-101 DCGII-102 DCGII-103 DCGII-104 DCGII-105 DCGII-106 DCGII-107 DCGII-108 DCGII-109 -14.7 to 0 0 to 15 0 to 30 0 to 60 0 to 100 0 to 200 0 to 300 0 to 500 0 to 1000 0 to 2000 -101.35 103.42 206.84 413.69 689.48 1379.0 2068.4 3447.4 6894.8 1379.0 -0.1013 0.1034 0.2067 0.4134 0.6890 1.3780 2.0670 3.4450 6.8900 13.780 -1.0335 1.0546 2.1092 4.2184 7.0307 14.061 21.092 35.153 70.307 140.61 -406.90 415.20 830.40 1660.8 2768.0 5536.0 8304.0 1384.0 2768.0 5536.0 -29.929 30.540 61.080 122.16 203.60 407.20 610.80 1018.0 2036.0 4072.0 -760.21 775.72 1551.4 3102.9 5171.5 1034.3 1551.4 2585.7 5171.5 -14.700 15.000 30.000 60.000 100.00 200.00 300.00 500.00 1000.00 2000.00 1013.5 1034.2 2068.4 4136.9 6894.8 1379.0 2068.4 3447.4 6894.8 -1.0135 1.0342 2.0684 4.1369 6.8948 13.790 20.684 34.474 68.948 137.90 ACCESSORIES Model A-644 BBV-0N PCHP-1u Description 9 V DC power adapter 2-valve block manifold Pneumatic calibration pump OPTIONS Use order code: Description NISTCAL-PG2 NIST traceable pressure calibration certificate 86 DWYER INSTRUMENTS, INC. | dwyer-inst.com uSee page 198 (Series PCHP)

® SERIES DPT DIGITAL PRESSURE TRANSMITTER WITH SWITCHES Two Solid State Switches, LED Display E R U S S E R P V I DEO O N L I N E The Series DPT Digital Pressure Transmitter with Switches combines a large, 14-segment LED display with two programmable solid state switches into one compact unit. A unique, 3-way rotating design allows the DPT to meet specific installation requirements without any retrofitting. The display and electrical connection can be rotated independently to maximize visibility while still orienting the electrical connection in the best position for the cable connector. Large, ergonomically designed push-buttons allow for quick/easy programming and thin-film piezoresistive sensor technology guarantees long-term reliability and stability. FEATURES/BENEFITS • Compact size, lightweight, and high accuracy supports multiple installation methods to support application need and footprint • Rotating display and electrical connection to maximize visibility while orienting the electrical connection in the best position for the cable connector APPLICATIONS • Calibration • Hydraulics and pneumatics • Machine tools • Compressors and pumps • Machine building l a t i g D i , s r e t t i m s n a r T 1-1/2 [38.00] 1-5/32 [29.50] 3-23/64 [85.40] 1-33/64 [38.60] SPECIFICATIONS Service: Compatible gases, liquids or vapors. Wetted Materials: Pressure connection: 316 L SS; Pressure sensor: 316 L SS (13- 8 PH for ranges above 150 psi). Housing: 316 L lower body, heat and chemical resistant fiberglass reinforced plastic (PBT) plastic head, TPE-E keyboard, PC display window. Accuracy: 1.0% FS (includes non-linearity, hysteresis, zero point). Pressure Limit: See table. Temperature Limits: 32 to 176°F (0 to 80°C). Process Connections: 1/4˝ male NPT. Display: Red LED 4-digit (0.35˝ H digits). Weight: 7 oz (0.2 kg). SWITCH SPECIFICATIONS Switch Type: PNP. Electrical Rating: 250 mA. Electrical Connections: M 12x1, 5-pin. Mounting Orientation: Mount in any position. TRANSMITTER SPECIFICATIONS Temperature Limits: 32 to 176°F (0 to 80°C). Thermal Effect: 0.2% FS / 10k. Power Requirements: 15-35 VDC. Output Signal: DPT-A: 4-20 mA; DPT-V: 0-10 VDC. Loop Resistance: DPT-A: ≤ 0.5k; DPT-V: > 10k. Power Consumption: ≤ 100 mA. Electrical Connections: M 12x1, 5-pin. Enclosure Rating: IP67. / s e h c t i w S / s e g a G e r u s s e r P e g n S i l MODEL CHART 0-10 VDC Model DPT-V00 DPT-V01 DPT-V02 DPT-V03 DPT-V04 DPT-V05 DPT-V06 DPT-V07 DPT-V08 DPT-V09 DPT-V10 4-20 mA Model DPT-A00 DPT-A01 DPT-A02 DPT-A03 DPT-A04 DPT-A05 DPT-A06 DPT-A07 DPT-A08 DPT-A09 DPT-A10 Range (psig) -14.5 to 0 0 to 15 0 to 25 0 to 30 0 to 50 0 to 100 0 to 160 0 to 200 0 to 300 0 to 500 0 to 1000 Maximum Pressure (psig) 30 30 60 60 100 200 290 400 600 1000 1740 Burst Pressure (psig) 75 75 150 150 250 500 500 1500 1500 2500 7975 Pressure Ranges bar 1.034 1.034 1.724 2.068 3.447 6.895 11.03 13.79 20.68 34.47 68.95 MPa .1034 .1034 .1724 .2068 .3447 .6895 1.103 1.378 2.068 3.447 6.895 kPa 103.4 103.4 172.4 206.8 344.7 689.5 1103 1378 2068 3447 6895 kg/cm2 1.055 1.055 1.758 2.109 3.515 7.031 11.25 14.06 21.09 35.15 70.31 OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate ACCESSORIES Model Description A-195 6´ (2 m) shielded cable with 5 pin female M-12 connections 88 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s e h c t i w S e r u s s e r P e g n S i l ® SERIES DA/DS | MERCOID® BY DWYER BOURDON TUBE PRESSURE SWITCH Pressure Ranges to 8000 psi (551.6 bar) 2-1/4 [57.15] Ø6-1/64 [152.8] 1-5/8 [41.28] 7/8 [22.23] 5-3/8 [134.97] 2-3/4 [69.08] 1/2˝ CONDUIT HOLE ADJUSTMENT SCREWS 5/8 [15.88] REAR MOUNTING FLANGE [3] .203 [5.16] DIA HOLES AT 120° ON 6-1/2 [165.1] DIA. BOLT CIRCLE 3-5/8 [92.27] 8 [203.20] 3-1/2 [88.90] 3-1/2 [88.90] 1/4 NPT [2] STD. Ø13/32 MOUNTING HOLES "U" "L" 1/2 NPT 7-3/4 [196.9] 3/4 PIPE THD. CONDUIT HOLE CONTROL ADJUSTMENTS 1-1/4 [30.40] 1/4 NPT 5/8 [15.82] ADJUSTMENTS GASKET 1 [26.39] GASKETED COVER DAH DAW 3-7/8 [98.43] 1-3/4 [44.45] 10 [253.92] 3/4 CONDUIT TH'D V I DEO O N L I N E 2-7/8 [71.63] 7 [177.80] 1-5/8 [41.91] 8 [201.79] 1/2˝ CONDUIT HUB Customers tell us that the Series DA/DS Bourdon Tube Pressure Switch is the best pressure switch made. The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA/DS Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The DS Models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available. FEATURES/BENEFITS • Visible calibrated dial provides an easy and fast check without having to open device causing dangerous conditions to operators • On/off indication (except hermetically sealed snap switch models) gives operator clear indication of state of switched equipment that could be located in another location • Adjustable or fixed deadband supports control applications by reducing equipment wear-out by unnecessary recycling • External switch set point adjustment reduces set-up time • Pressure ranges of full vacuum to 8000 psig gives application designers the ability to specify standard equipment, simplifying install and training, and reducing servicing costs • UL listed, CSA approved, many models FM approved to support rigorous process applications and regulations • General purpose, weatherproof or explosion-proof enclosures for a variety of indoor or outdoor environments meeting the needs of multiple applications and uses APPLICATIONS • Compressors • Mechanical HVAC or process equipment • Pump control SPECIFICATIONS Wetted Materials: Brass, 403 SS, or 316 SS. Temperature Limit: 180°F (82°C). Pressure Limit: Maximum pressure of the operating range. Enclosure Rating: General purpose, weatherproof or explosion-proof. Repeatability: ±1% of full operating range, ±1.5% on DS-7300 models. Switch Type: SPST mercury switch, SPDT mercury switch, SPDT snap switch, or SPDT hermetically sealed snap switch. Other circuit types available. Electrical Rating: See model charts. Electrical Connections: Screw terminal. Conduit Connection: General purpose: 1/2˝ hole for conduit hub; Weatherproof: 1/2˝ conduit hub; Explosion-proof: 3/4˝ female NPT. Process Connection: General purpose and weatherproof: 1/4˝ male NPT, 1/2˝ male NPT on ranges 15S and 16S; Explosion-proof: 1/2˝ male NPT and 1/4˝ female NPT. Mounting Orientation: Vertical. Set Point Adjustment: Thumbscrew. Weight: General purpose: 4 lb (1.8 kg); Weatherproof: 6 lb (2.7 kg); Explosion- proof: 8 lb (3.5 kg). Deadband: See model chart. Agency Approvals: CSA, FM, UL (mercury switch units are not CE approved) (Consult factory for FM approved models). 90 DWYER INSTRUMENTS, INC. | dwyer-inst.com USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

E R U S S E R P s e h c t i w S e r u s s e r P e g n S i l ® SERIES SA1100 | MERCOID® BY DWYER DIAPHRAGM OPERATED PRESSURE SWITCH Visible Set point, Adjustable Deadband, Hermetically Sealed Snap Switch, Weatherproof and Explosion-Proof SWITCH COVER 3-31/32 [100.62] 3-3/8 [84.91] COVER SET SCREW 3/4 NPT CONDUIT CONNECTION 7-7/16 [188.25] 4-5/8 [116.89] 3/16 [4.8] DIA. BRACKET MOUNTING HOLES ADJUSTMENT COVER 5-25/32 [147.07] 3-9/16 [91.19] 4 [102.04] 1-13/16 [45.88] PROCESS CONNECTION 2-1/4 [57.17] 3-3/8 [84.58] OPTIONAL BREATHER DRAIN V I DEO O N L I N E The Series SA1100 Diaphragm Operated Pressure Switch is weatherproof and explosion-proof in one economical enclosure. Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full-scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both set point and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16˝ open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54. FEATURES/BENEFITS • Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation • Burst pressure protection prevents device failure where high-pressure surges may damage device costing down-time and repair/replacement • Adjustable deadband reduces equipment cycling and potential failure • Visible set point and deadband adjustments provide an easy and fast check without having to open device causing dangerous conditions to operators APPLICATIONS • Chemical, petroleum, food and drug processing industries • Used indoor, outdoor or in explosion-proof area • Pump control SPECIFICATIONS Wetted Materials: See pressure chamber and diaphragm material in model chart. *Temperature Limits: -30 to 180°F (-35 to 82°C) standard; ATEX compliant at Ambient Temperature: -4 to 167°F (-20 to 75°C); Process Temperature: -4 to 167°F (-20 to 75°C). Pressure Limit: 1200 psig (82.6 bar). *Enclosure Rating: Weatherproof and Explosion-proof. Listed with UL and CSA for 0344 Class I, Groups B, C and D; Class II Groups E, F, and G. ATEX Compliant II 2 G EEx d IIC T6 Process Temperature 75°C. Weatherproof UL Rated Type 4. Meets NEMA 4X (IP66). Switch Type: SPDT or DPDT snap switch. Electrical Rating: See model chart. Electrical Connections: Screw terminal. Conduit Connection: 3/4˝ female NPT. Process Connection: 1/2˝ female NPT. Mounting Orientation: Within 20° of vertical. Set Point Adjustment: Internal 7/16˝ hex nuts. Weight: 3.5 lb (1.6 kg). Deadband: See deadband chart. *Agency Approvals: ATEX, CE, CSA, UL. *Options that do not have ATEX. SWITCH DEADBAND CHART Adjustable Operating Range psig 10-150 20-250 30-500 bar 0.7-10 1.4-17.2 2.0-34 Range Number 11 12 13 High Approximate Approximate Minimum Deadband Maximum Low Deadband psig bar psig bar psig bar 4.0 5.2 5.0 10 12 21 0.28 0.35 0.83 7.5 12.5 45 0.52 0.86 3.1 75 150 300 MODEL CHART Example Construction Adjustable Pressure Ranges Circuit (Switch) Options Pressure Chamber Material (Wetted) Diaphragm Material (Wetted) Circuit (Switch) Type Process Connection *Options SA11 13 E -A 4 -K 2 SA11 11 12 13 E HS HG A S 4 5 K L 2 SA1113E-A4-K2 Series designator, weatherproof NEMA 4X, explosion-proof NEMA 7, 9 Adjustable range 10 to 150 psig (0.7-10 bar) Adjustable range 20 to 250 psig (1.4-17.2 bar) Adjustable range 30 to 500 psig (2.0-34.0 bar) Snap action switch rated 15 A @ 125/250/480 VAC, 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 1/2 A @ 125 VDC resistive, 1/4 A @ 250 VDC resistive Hermetically sealed snap action switch rated 5 A @ 125/250 VAC, 5 A resistive @ 30 VDC* Hermetically sealed snap action switch with gold contacts rated 1A @ 125 VAC, 1 A resistive @ 30 VDC* Aluminum 316 SS Buna-N diaphragm and O-ring Fluorocarbon diaphragm and O-ring SPDT DPDT (not available with HS or HG switch options) 1/2 inch female NPT AT DRAIN ATEX certified construction Housing with drain - allows condensate to be drained from inside enclosure (meets NEMA 3R instead of 4X) *Options that do not have ATEX Examples: SA1111E-A4-K2; SA1111E-S5-K2 92 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s e h c t i w S e r u s s e r P e g n S i l ® SERIES H2 | W. E. ANDERSON™ BY DWYER DUAL-ACTION EXPLOSION-PROOF PRESSURE SWITCH Explosion-proof and Weatherproof Enclosure Ø2-5/8 [66.68] 3-3/8 [85.73] V I DEO O N L I N E Explosion-Proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The Series H2 Dual-Action Explosion-Proof Pressure Switch is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The design consists of two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston actuates a separate switch independent of the other. The switches may be adjusted to operate together, at opposite ends of the range or at two intermediate set points. The threaded top is removed to field adjust or service switches without disturbing electrical or pressure connections. The Duotect® switch is explosion-proof and weatherproof. It can be mounted in any position and is not affected by vibration. FEATURES/BENEFITS • Explosion-proof and weather-proof housing provides device protection for outdoor use or harsh environment operation • UL listed, CSA approved to support rigorous process applications and regulations • Independent piston action design for either gas or liquid allows switches to active together or independently based on settings • Mounting in any position and not affected by vibration provides reliable switching for equipment APPLICATIONS • Mechanical HVAC or process equipment • Chemical, petroleum, food and drug processing industries • Process and Industrial applications SERIES A1F | MERCOID® BY DWYER OEM PRESSURE SWITCH Field Adjustable with Weather-Proof Enclosure ø1-53/64 [ø46.43] INSULATIVE BARRIER [OPEN ON TOP] [3] ELECTRICAL TERMINALS SPDT SNAP SWITCH 3-3/4 [95.25] SET POINT ADJUSTMENT CAP GROUND SCREW 1/2 NPT [MALE CONNECTION] 1/4 NPT [FEMALE CONNECTION] A1F 1-7/16 [36.51] Low cost and precision made, the Series A1F Low Cost OEM Pressure Switch is ideal for OEM industrial applications. Wetted materials of 316 SS and fluorocarbon ensure great chemical compatibility with a wide range of process media. The open case style is perfect for panel mounting applications like pump skids. Weatherproof enclosure is available in polycarbonate offering a low cost weatherproof switch. Superior 15 A contact allows direct control of motors or pumps without the use of external relays, a true cost savings. Features include a convenient indicating scale for quick and easy field adjustment. FEATURES/BENEFITS • 15 A contact allows direct control reducing costs and reliability by having to introduce additional contacts and relays • Case style allows use for panel mounting application with optional weather-proof enclosure for use in outdoor environments • Field adjustable reduces installation time bring application on-line faster • Wetted material provides support for wider range of process media APPLICATIONS • OEM • Compressors • Motor control • Process equipment • Pump control 5 [127.00] 3/4 NPT ELECTRICAL CONNECTION 2-15/16 [74.63] 1/4 NPT PRESSURE CONNECTION SPECIFICATIONS Wetted Materials: 316 SS chamber with FEP diaphragm and Buna-N O-ring standard. Fluoroelastomer or EPDM O-ring optional. Temperature Limit: 275°F (135°C). CSA approved: -20 to 90°C (-4 to 184°F). Pressure Limit: 1500 psig (103 bar). Enclosure Rating: UL listed explosion- proof, Class I, Groups B, C, and D. Class II Groups E, F, and G. Meets NEMA 4X (IP66). CSA optional. Class I, Groups B, C & D. Class II, Groups E, F, & G -20°C ≤ Tamb ≤ 75°C T6 [optional -20°C ≤ Tamb ≤ 40°C T5] Type 4. Switch Type: Two SPDT snap switches. Electrical Rating: 5 A @ 125/250 VAC. 5 A res., 3 A ind. @ 30 VDC. Gold contacts optional. Electrical Connections: 18 AWG, 18˝ (460 mm) long. Conduit Connection: 3/4˝ female NPT. Process Connection: 1/4˝ female NPT. Mounting Orientation: Any position. Set Point Adjustment: Internal nut. Weight: 2 lb (.9 kg). Deadband: Approximately 10% of range. Agency Approvals: CSA, UL. MODEL CHART Model Low Range psig (bar) H2S-1 H2S-2 H2S-3 3 to 40 (0.21 to 2.76) 25 to 250 (1.72 to 17.2) 100 to 1000 (6.89 to 68.9) High Range psig (bar) 5 to 75 (0.35 to 5.17) 30 to 400 (2.07 to 27.6) 150 to 1500 (10.3 to 103) 5-7/16 [138.11] 4 [101.6] 1-29/32 [48.41] 1-1/2 [38.10] 4-11/16 [119.06] 1-17/32 [38.89] 3-1/16 [77.79] A1F with weatherproof enclosure SPECIFICATIONS Service: Compatible liquids and gases. Wetted Materials: Pressure chamber: 316 SS; Diaphragm: Fluorocarbon. Temperature Limit: -40 to 175°F (-40 to 80°C). Pressure Limits: 500 psig (34 bar). Enclosure Rating: No rating for open construction. Installed properly within an optional weatherproof enclosure meets NEMA 4X (IP66) standards. Switch Type: SPDT snap switch. Electrical Rating: 15 A @ 120/240/480 VAC; 1/8 HP @ 125 VAC; 1/4 HP @ 250 VAC. Electrical Connection: Screw terminals. Process Connection: 1/4˝ female NPT and 1/2˝ male NPT. Mounting Orientation: Within 20° of vertical. Set Point Adjustment: Knurled screw cap with indicating scale. Deadband: Fixed. See deadband chart. Weight: 10.5 oz (297 g). Agency Approvals: cULus. MODEL CHART Range psg (bar) 2 to 15 (0.14 to 1.03) 4 to 75 (0.28 to 5.17) 8 to 225 (0.55 to 15.5) 16 to 450 (1.1 to 31.0) Model A1F-O-SS-1-1 A1F-O-SS-1-2 A1F-O-SS-1-3 A1F-O-SS-1-4 Note: Optional enclosure factory installed. To order, change O to PC. Example: A1F-PC-SS-1-1 Deadband at Min. Range psg (bar) 2 (0.14) 4 (0.27) 8 (0.55) 15 (1.0) Deadband at Max. Range psg (bar) 3 (0.21) 15 (1.0) 25 (1.7) 50 (3.5) 94 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s e h c t i w S e r u s s e r P e g n S l i ® SERIES A6 | MERCOID® BY DWYER DURABLE PRESSURE SWITCHES Designed for Extended Duty, Simple and Reliable 1/4˝ NPT #8-32 SCREW TERMINALS 2-7/16 [62] ø1.500 [ø38.1] ø1-1/2 [ø38.1] ø1-1/2 [ø38.1] 2 [50.8] 2-5/16 [58.74] A-439 A-440 A-439 A-440 Series A6 Durable Pressure Switches have been specifically designed to stand up to extended duty applications. These switches are constructed with a polyimide film diaphragm and are compatible with a variety of fluids. For ease of installation, the switches come with a 1/4˝ male NPT process connection and can be mounted in any orientation. The Series A6 pressure switches are compact and have great set point integrity, and feature simple, easy set point field adjustment. FEATURES/BENEFITS • High switch cycle means long life for extended duty applications • Mounting in any position and feature simple makes a reliable switching for equipment and OEM applications APPLICATIONS • OEM • Process equipment • Process applications MODEL CHART Model A6-153221 A6-253221 A6-353221 A6-453221 A6-553221 A6-653221 A6-753221 A6-853221 Set Point Range psi (bar) NC 0.5 to 1 (0.03 to 0.07) 1.1 to 3 (0.08 to 0.21) 3.1 to 7 (0.21 to 0.48) 8 to 13 (0.55 to 0.90) 14 to 24 (0.97 to 1.66) 25 to 50 (1.73 to 3.45) 51 to 90 (3.52 to 6.21) 91 to 150 (6.28 to 10.35) NO 1.1 to 3.1 (0.08 to 0.21) 2.27 to 6.05 (0.16 to 0.42) 4.22 to 10.75 (0.29 to 0.74) 12.3 to 17.5 (0.85 to 1.21) 18.6 to 31.8 (1.28 to 2.19) 33.1 to 61 (2.28 to 4.21) 65.6 to 112.3 (4.53 to 7.75) 114.7 to 198.3 (7.94 to 13.68) SPECIFICATIONS Service: Air, motor oils, transmission oils, jet fuels, and similar hydrocarbon media. (Not for water use) Wetted Materials: Base: 304 SS; Diaphragm: Polyamide film. Temperature Limits: -40 to 248°F (-40 to 120°C). Pressure Limits: Operating pressure: 150 psi (10.3 bar) for 0.5-24 psi set point ranges, 250 psi (17.2 bar) for 25 to150 psi set point ranges; Proof pressure: 500 psi (34.5 bar); Burst pressure: 750 psi (51.7 bar) for 0.5-24 psi set point ranges, 1250 psi (86.2 bar) for 25-150 psi set point ranges. Enclosure Rating: General purpose or with cover: IP65 - weatherproof. Repeatability: ±10% of set point. Set Point Tolerance: ±15% of range. Switch Type: 1 SPST NO, 1 SPST NC. NO and NC switch independent from each other. Electrical Ratings: Resistive: 15 A @ 6 VDC, 8 A @ 12 VDC, 4 A @ 24 VDC; Inductive: 1 A @ 120 VAC, 0.5 A @ 240 VAC. Electrical Connections: #8-32 screw terminals. Process Connection: 1/4˝ NPT male. Mounting Orientation: Switch can be installed in any position. Set point Adjustment: Screw. Weight: 0.13 lb (0.06 kg). ACCESSORIES Model Description A-439 A-440 Weatherproof IP65 cover Weatherproof IP65 with fly-wire holes USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov SERIES AP | MERCOID® BY DWYER DIAPHRAGM OPERATED PRESSURE SWITCH Visible Set point Adjustment, Compact 15/16 [23.81] Ø7/8 [22.23] KNOCK-OUT HOLE 7/8 [22.23] CONDUIT HOLE 1-1/16 [26.99] 5-1/16 [128.69] 4-11/16 [119.36] 2-13/32 [61.13] [2]Ø1/4 [6.35] MOUNTING HOLE WITH SEALING WIRE 1-7/16 [36.52] 2-7/8 [73.03] 3-1/8 [79.71] 4 [101.60] 1-13/16 [46.05] 1/4 NPT 4-1/8 [104.78] ADJUSTMENT SCREW WITH SEALING WIRE SPECIFICATIONS Wetted Materials: Nylon reinforced Buna-N and steel. PTFE and 316 SS optional. Temperature Limits: -30 to 150°F (-35 to 66°C). Pressure Limit: See model chart. Enclosure Rating: General purpose. Weatherproof and explosion-proof optional. Switch Type: SPDT mercury switch or SPDT snap switch. Other switch types available. Electrical Rating: Mercury switch: 4 A @ 120 VAC/DC, 2 A @ 240 VAC/DC; Snap switch: 15 A @ 120 VAC, 8 A @ 240 VAC, 0.5 A @ 120 VDC, 0.25 A @ 240 VDC. Electrical Connections: Screw terminal. Conduit Connection: 7/8˝ (22.23 mm) hole for 1/2˝ (12.7 mm) conduit hub. Process Connection: 1/4˝ female NPT. Mounting Orientation: Vertical for mercury switch models, any position for snap switch models. Set Point Adjustment: External screw. Weight: General purpose: 2 lb (0.9 kg). Deadband: See model chart. Agency Approvals: FM, UL. For FM consult factory. Reliable and convenient, the Series AP Diaphragm Operated Pressure Switch is a compact switch for instrument air or other low pressure applications. Visible set point and external adjustment add convenience. Used on air, non-corrosive gas or liquid service compatible with wetted parts. Units are available in weather-proof and explosion-proof housing. FEATURES/BENEFITS • Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation • External switch set point adjustment reduces set-up time APPLICATIONS • Low pressure applications • Instrument air MODEL CHART Model AP-153-33 AP-153-37 AP-153-39 AP-7021-153-33 AP-7021-153-37 AP-7021-153-39 *Mercury switch units are not CE approved. Switch* Type SPDT Mercury Mercury Mercury Snap Snap Snap Ranges 10 in VAC to 50 in w.c. (2.5 to 12.4 kPa) 1 to 30 psig (.07 to 2.1 bar) 10 to 125 psig (.69 to 8.6 bar) 10 in VAC to 50 in w.c. (2.5 to 12.4 kPa) 1 to 30 psig (.07 to 2.1 bar) 10 to 125 psig (.69 to 8.6 bar) Switch Deadband Low 5 in w.c. (1.2 kPa) 0.4 psig (0.03 bar) 2 psig (0.14 bar) 8 in w.c. (2.0 kPa) 0.75 psig (0.05 bar) 3 psig (0.21 bar) High 6 in w.c. (1.49 kPa) 0.75 psig (0.05 bar) 6 psig (0.04 bar) 10 in w.c. (2.49 kPa) 1.5 psig (0.10 bar) 7 psig (0.48 bar) Max. Press. psig(bar) 15 (1.03) 60 (4.14) 160 (11.0) 15 (1.03) 60 (4.14) 160 (11.0) 96 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s e h c t i w S e r u s s e r P e g n S i l ® SERIES CXA | MERCOID® BY DWYER WATER PUMP PRESSURE SWITCH Simple, Reliable, Adjustable Set Point and Deadband 2-9/16 [65] 3-45/64 [94] 3-3/8 [85.5] The Series CXA Water Pump Pressure Switch has been proven reliable for controlling automatic water systems. These switches are very popular for use on water well pumps and pumping systems. The set point and dead-band are both easily adjustable via screws inside the cover. For ease of installation, the switches come with a 1/4˝ female NPT process connection and can be mounted in any orientation. The series CXA’s simple design makes it a great switch for an installer at any skill level. FEATURES/BENEFITS • The set point and deadband are both easily adjustable reducing time to install and operation • Mounting in any position and feature simple makes a reliable switch that can be installed by any skill level APPLICATIONS • Electric water pumps • Water system applications • Well pumps • Pumping systems 2-17/64[57.6] SPECIFICATIONS Service: Compatible liquids and gases. Wetted Materials: Silicone, steel, and SS. Temperature Limits: 140°F (60°C). Pressure Limits: See model chart. Enclosure Rating: General purpose. Repeatability: ±5 psig (±0.3 bar). Switch Type: DPST snap action (see model chart). Electrical Ratings: 20 A @ 120 VAC, 12 A @ 240 VAC, 9.6 A @ 240 VAC (3 phase), 8.6 A @ 32 VDC, 3.1 A @ 120 VDC, 1.6 A @ 240 VDC. Electrical Connections: Screw terminal. Conduit Connection: 7/8˝ hole for 1/2˝ conduit hub (2 places). Process Connection: 1/4˝ female NPT. Mounting Orientation: Switch can be installed in any position. Set Point Adjustment: Internal screws. Weight: 0.75 lb (0.34 kg). Deadband: See model chart. MODEL CHART Model CXA-S1 CXA-S2 CXA-S3 CXA-R1 CXA-R2 CXA-R3 Switch Type Range psig (bar) NC NC NC NO NO NO 15 to 80 (1.0 to 5.5) 30 to 100 (2.1 to 6.9) 35 to 150 (2.4 to 10.3) 15 to 80 (1.0 to 5.5) 30 to 100 (2.1 to 6.9) 35 to 150 (2.4 to 10.3) Approx. Adjustable Deadband psig (bar) Max. Pressure psig (bar) 15 to 30 (1.0 to 2.1) 20 to 35 (1.4 to 2.4) 30 to 40 (2.1 to 2.8) 15 to 30 (1.0 to 2.1) 20 to 35 (1.4 to 2.4) 30 to 40 (2.1 to 2.8) 129 (8.9) 179 (12.3) 204 (14.1) 129 (8.9) 179 (12.3) 204 (14.1) SERIES 681 SANITARY PRESSURE TRANSMITTER No Liquid Fill Diaphragm, Sanitary Clamp Fitting 1/2 NPT 1.743 [44] 2.272 [58] 2.516 [64] The Series 681 Sanitary Pressure Transmitter is designed to meet 3A standards for applications in food, dairy, beverage and pharmaceutical processing, liquid level control, and sanitary pipelines. The unit is fully sealed to withstand high pressure wash- down in Clean-in-Place (CIP) and Sterilize-in-Place (SIP) installations. The Series 681 is designed with a unique, no liquid fill diaphragm and a sanitary clamp pressure fitting for easy installation with negligible clamping effect. A conduit fitting, shielded cable with vent tube and sealed screws for zero and span adjustment combine to make the Series 681 completely watertight. FEATURES/BENEFITS • Fully sealed to withstand Clean-in-Place and Sterilize-in-Place installations supports regulatory conditions for sanitary processes • Sanitary clamp fitting makes for easy installation APPLICATIONS • Sanitary process applications • Food and beverage processing • Water processing • Dairy processing • Pharmaceutical processing SPECIFICATIONS Service: Compatible liquids and gases. Wetted Parts: 316L SS. Accuracy: ±.20% FS (includes non-linearity, hysteresis and non-repeatability). Temperature Limits: -40 to 260°F (-40 to 125°C) 10 to 90% RH, non-condensing. Pressure Limits: See table. Compensated Temperature Range: 20 to 180°F (-7 to 80°C). Thermal Effect: Zero and span shift: ±2.0% FS/100°F. Power Requirements: 9-30 VDC. Output Signal: 4-20 mA, 2-wire. Zero and Span Adjustment: ±0.5 mA, non-interactive. Response Time: ≤ 10 ms. Loop Resistance: 800 Ω. Electrical Connections: 1/2˝ conduit fitting and strain relief with 15 ft (4.5 m) cable. Process Connection: 2˝ or 1-1/2˝ sanitary clamp fitting male NPT. Clamping Effect: Zero and span shift: ±0.15% FS for ranges up to 30 psi; ±0.25% FS for ranges >30 psi. Weight: 8 oz (227 g). MODEL CHART Model Range 681-02 681-12 681-42 681-52 681-62 0 to 1 psi 0 to 2 psi 0 to 15 psi 0 to 30 psi 0 to 60 psi Overpressure Sanitary Clamp Connection 50 psi 100 psi 150 psi 150 psi 180 psi 2˝ 2˝ 2˝ 2˝ 2˝ 98 DWYER INSTRUMENTS, INC. | dwyer-inst.com OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate for pressure transmitters

® SERIES 682 INDUSTRIAL PRESSURE TRANSMITTER ±0.13% FS Accuracy, External Adjustments, 4-20 mA Output 1-31/32 [49.73] 2 [50.8] 1/4 NPT ø2 [50.8] 3/4 [19.05] The Series 682 Industrial Pressure Transmitter is designed to withstand environmental effects such as shock, vibration, temperature, and EMI/RFI. The electronics and capacitive sensor are packaged in a welded stainless steel housing and meets NEMA 4 (IP65) protection ratings. FEATURES/BENEFITS • Weather-proof welded housing provides device protection for outdoor use or harsh environment operation • Not affected by environmental effects such as temperature, shock, vibration, and EMI/RFI provides reliable switching for equipment • External span and zero adjustments reduce installation and service time APPLICATIONS • Off-road equipment • Compressor control • Industrial refrigeration • Hydraulic systems • Industrial engines SPECIFICATIONS Service: Compatible liquids and gases. Wetted Parts: 17-4 PH SS. Accuracy: ±.13% FS (includes non-linearity, hysteresis and non- repeatability). Temperature Limits: -40 to 260°F (-40 to 125°C) 10 to 90% RH, non- condensing. Pressure Limit: See table. Compensated Temperature Range: -4 to 176°F (-20 to 80°C). Thermal Effect: Zero shift: 1.0% FS/100°F span shift: ±1.5% FS/100°F. Power Requirements: 9-30 VDC. Output Signal: 4-20 mA, 2-wire. Zero and Span Adjustment: ±0.5 mA, non-interactive. Response Time: 5 ms. Loop Resistance: 800 Ω. Electrical Connections: 2 ft (51 cm) multiconductor cable. Process Connection: 1/4˝ male NPT. Weight: 8 oz (227 g). Shock: 200 g operating. Vibration: 20 g 50-2000 Hz. MODEL CHART Model* Range 682-1 682-2 *Units calibrated in bar also available. Consult factory. Overpressure Model* Range 150 psi 300 psi 0 to 50 psi 0 to 100 psi 682-3 682-4 0 to 250 psi 0 to 500 psi Overpressure 500 psi 1000 psi OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate E R U S S E R P s r e t t i m s n a r T e r u s s e r P e g n S i l SERIES 672 LOW PRESSURE TRANSDUCER Single Pressure Connection, Ranges down to 10 in w.c. The Series 672 Low Pressure Transducer is a perfect solution to any The Series 672 Low Pressure Transducer is a perfect solution to any application where a very accurate low pressure transducer is necessary. Using variable capacitance technology, the Series 672 is designed to measure pressures as low as 10 in w.c. up to 400 in w.c., very low ranges for a single connection pressure transducer. The 672 also features a 0.25% FS accuracy. Use the Series 672 in liquid level, flood warning, waste water, clean room, and open channel flow applications. FEATURES/BENEFITS • Low range high accuracy provides precise control for process applications APPLICATIONS • Liquid level • Flood warning • Waste water • Clean room • Open flow applications MODEL CHART Model Operating Range Output 672-1-A 672-2-A 672-3-A 672-4-A 672-5-A 672-6-A 672-7-A 672-8-A 672-9-A Note: For voltage output models change -A to -V. 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 4-20 mA, 2-wire 0 to 10 in w.c. 0 to 15 in w.c. 0 to 25 in w.c. 0 to 50 in w.c. 0 to 100 in w.c. 0 to 150 in w.c. 0 to 200 in w.c. 0 to 300 in w.c. 0 to 400 in w.c. 100 DWYER INSTRUMENTS, INC. | dwyer-inst.com 3-3/4 [95.48] ø1-1/2 [38.10] 1/4 MALE NPT CONNECTION SPECIFICATIONS Service: Compatible liquids and gases. Wetted Materials: 318 duplex SS, ceramic, fluoroelastomer (FKM). Housing Material: 318 stainless steel. Accuracy: ±0.25% FS (RSS). Includes non-linearity, hysteresis, and non- repeatability. Stability: 0.25% FS/1 year. Temperature Limits: -40 to 212°F (-40 to 100°C). Compensated Temperature Limits: -5 to 140°F (-20 to 60°C). Pressure Limits: 29 psi (2 bar) for up to 85 in w.c. (0.2 bar) ranges; 58 psi (4 bar) for 85 to 140 in w.c. (0.2 to 0.35 bar); 73 psi (5 bar) for 141 to 400 in w.c. (0.35 to 1 bar). Thermal Effects: Zero: 1.0%FS/100°F (2.0%FS/100°C); Span: 1.0%FS/100°F (2.0%FS/100°C). Power Requirements: 4-20 mA: 9-35 VDC; 0-5 VDC: 7.5-35 VDC. Output Signal: 4-20 mA (2-wire) or 0-5 VDC (3-wire). Zero & Span Adjustment: ±10% FS each (by potentiometer). Response Time: 5 ms. Max Loop Resistance: 1.325 kΩ. Electrical Connections: Large DIN 43650 connector with mating plug. Process Connection: 1/4˝-18 NPT male. Enclosure Rating: NEMA 4X (IP66). Weight: 11.6 oz (330 g). OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate

E R U S S E R P s r e t t i m s n a r T e r u s s e r P e g n S i l ® SERIES 626 & 628 INDUSTRIAL PRESSURE TRANSMITTERS Complete Offering of Ranges, Connections and Outputs 626/628 pressure transmitters with general purpose housing (-GH) 626/628 pressure transmitters with conduit box housing (-CB) and LCD display V I DEO O N L I N E The Series 626 Industrial Pressure Transmitters possess a highly precise 0.25% full-scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X (IP66) stainless steel general purpose housing or cast aluminum conduit housing. The Series 628 Industrial Pressure Transmitters are ideal for OEMs with 1% full-scale accuracy sensors. The corrosion resistant 316L stainless steel wetted parts allow the Series 626 and 628 transmitters to measure the pressure in a multitude of processes from hydraulic oils to chemicals. The Series 626 and 628 are available in absolute and gage pressure ranges with a variety of optional outputs, process connections and electrical terminations to allow you to select the right transmitter for your application. FEATURES/BENEFITS • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists • Robust 316 SS oil filled sensor provides shock and vibration resistance insuring stability in controlling pressure for process applications • A wide range of models and connections that can meet pressure measurement specifications from low to very high APPLICATIONS • Compressors • Pumping systems • Irrigation equipment • Hydraulic • Industrial process monitoring *Please see our website for dimensional drawings. SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Type 316L SS. Accuracy: 626: 0.25% FS; 626: 0.20% RSS; 628: 1.0% FS; 628: 0.5% RSS; 626 Absolute Ranges: 0.5% FS; 626 absolute ranges: 0.30% RSS. (Includes linearity, hysteresis, and repeatability.) Temperature Limit: 0 to 200°F (-18 to 93°C). Compensated Temperature Range: 0 to 175°F (-18 to 79°C). Thermal Effect: ±0.02% FS/°F (includes zero and span). Pressure Limits: See table. Power Requirements: 10-30 VDC (for 4-20 mA, 0-5, 1-5, 1-6 VDC outputs); 13-30 VDC (for 0-10, 2-10 VDC outputs); 5 VDC ±0.5 VDC (for 0.5-4.5 VDC ratio-metric output), 10-35 VDC (for 4-20 mA with -CB option); 13-35 VDC or isolated 16-33 VAC (for selectable output with -CB option). Output Signal: 4-20 mA, 0-5 VDC,1-5 VDC, 0-10 VDC, or 0.5-4.5 VDC, or selectable 0-5, 1-5, 0-10, 2-10 VDC for -CB option. Response Time: 300 ms. Loop Resistance: 0 to 1000 Ω max. R max = 50 (Vps-10) Ω (4-20 mA output), 0-1250 Ω max. Rmax = 50(Vps-10) Ω (4-20 mA output with -CB option), 5K Ω (0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output). Stability: 1.0% FS/year (Typ.). Current Consumption: 38 mA maximum (for 4-20 mA output); 10 mA maximum (for 0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output); 140 mA maximum (for all 626/628/629-CH with optional LED). Electrical Connections: See model chart. Process Connection: See model chart. Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Mount in any position. Weight: 10 oz (283 g). Agency Approvals: CE, NSF, UL. 102 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U S S E R P s r e t t i m s n a r T e r u s s e r P e g n S i l ® SERIES 636 FIXED RANGE PRESSURE TRANSMITTER Stainless Steel, Explosion-Proof, Accuracy ±0.30%, 4-20 mA or 1-5 VDC Signal 3/4 NPT #22 AWG LEADS 24 [609.60] LEADS PLUS SHIELD/DRAIN 1-1/4 [31.75] HEX Ø1-25/32 [45.24] 1 [25.40] HEX 1/2 NPT 1-1/8 [28.58] 1-1/4 [31.75] 4-1/16 [103.19] SPECIFICATIONS Service: Liquid, gas or vapor. Wetted Materials: 316 L SS. Fill Fluid: DC 200 silicone (standard). Accuracy: ±0.30% of calibrated span. Stability: ±0.5% of upper range limit for six months. Temperature Limits: Electronics (ambient): -40 to 140°F (-40 to 60°C); Process interface: -40 to 212°F (-40 to 100°C). Pressure Limits: 300% upper range limit. Compensated Temperature Range: -20 to 180°F (-29 to 82°C). Thermal Effect: (includes zero and span). Between -20 and 180°F (-29 and 82°C). ±2.0% per 50°F (28°C). Power Requirements: 12-30 VDC (636), 8-14 VDC (636LP), reverse polarity protection. Output Signal: 4-20 mA DC, limited to 30 mA DC (636), 1-5 VDC (636LP). Zero & Span Adjustments: Null: 4.0 mA ±2% span (636),1 VDC ±1% span (636LP); Span: 16.0 mA ±1% span (636), 4 VDC ±1% span (636LP). Loop Resistance: 900 Ω max @ 30 V. Electrical Connection: 3/4˝ female NPT 24˝ (61 cm), 22 AWG. Process Connection: 1/2˝ female NPT. Enclosure Rating: NEMA 4 (IP56). Weight: 0.83 Ib (374 g). Agency Approvals: CSA, FM. FM and CSA approved explosion-proof for Class I, Division 1, Groups B, C, & D, Class II Groups E, F, & G Class III. The Series 636 Fixed Range Pressure Transmitter is a low cost, fixed range, stainless steel transmitter with ±0.30% accuracy. It is designed to continuously measure pressure for years in even the toughest environmental and media conditions. Transmitters are explosion-proof, (FM approved) and meet NACE standards for off- shore applications. FEATURES/BENEFITS • Long service life and lower cost to maintain reduces total cost of ownership • Explosion-proof housing for use in applications where protection of process and personnel is needed APPLICATIONS • Off-shore • Process applications MODEL CHART 4-20 mA OUT 636-0 636-1 636-2 636-3 1-5 VDC OUT 636-0-LP 636-1-LP 636-2-LP 636-3-LP Operating Range, psi 0 to 15 0 to 30 0 to 100 0 to 300 Operating Range, Bar 0 to 1 0 to 2 0 to 7 0 to 20 OPTIONS Use order code: Description NISTCAL-PT1 NIST traceable calibration certificate 104 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES 3200G | MERCOID® BY DWYER EXPLOSION-PROOF PRESSURE TRANSMITTER HART®, Push-Button Configuration, Rangeability (100:1) E R U S S E R P V I DEO O N L I N E 3-1/2 [89] 4-1/4 [108] 2-3/4 [70] 1-1/2 [38] 6-1/4 [159] 1/2 NPT s r e t t i l m s n a r T e r u s s e r P e g n S i The Mercoid® Series 3200G Explosion-Proof Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push-button configuration, and programmable using HART® Communication. The Series 3200G is capable of being configured with the zero and span buttons, a field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3200G is FM approved for use in hazardous (Classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application. FEATURES/BENEFITS • Completely configurable using zero/span buttons (no calibrator required) • Rangeability (100:1) • High accuracy (±0.075%) • Automatic sensor temperature compensation • Fail-mode process function APPLICATIONS • Water and wastewater • Chemical and petrochemical • Pulp and paper • Oil and gas • Food and beverage SPECIFICATIONS Service: Compatible gases, steam, liquids or vapors. Wetted Materials: 316L SS. Accuracy: ±0.075% FS (@ 20°C). Rangeability: 100:1 turn down. Stability: ±0.125% FSO/yr. Temperature Limits: Process: -40 to 248°F (-40 to 120°C); Ambient: Without LCD -40 to 185°F (-40 to 85°C); With LCD -22 to 176°F (-30 to 80°C). Thermal Effect: ±0.125% span/32°C. Power Requirements: 11.9 to 45 VDC. Output Signal: 4 to 20 mA / HART® Communication. Response Time: 0.12 s. Damping Time: 0.25 to 60 s. Loop Resistance: Operation: 0 to 1500 Ω; HART® Communication: 250 to 500 Ω. Electrical Connection: Two 1/2˝ female NPT conduit, screw terminal. Process Connections: 1/2˝ female NPT. Display: Optional 5 digit LCD. Enclosure Rating: NEMA 4X (IP66) and explosion proof for Class I, Div I Groups A, B, C and D. Weight: 5.5 lb (2.5 kg). Agency Approvals: ATEX, CE, FM. MODEL CHART Model 3200G-1-FM-1-1 3200G-2-FM-1-1 3200G-3-FM-1-1 3200G-4-FM-1-1 3200G-5-FM-1-1 3200G-1-FM-1-1-LCD 3200G-2-FM-1-1-LCD 3200G-3-FM-1-1-LCD 3200G-4-FM-1-1-LCD 3200G-5-FM-1-1-LCD Note: Contact factory for custom calibration. Range psi (kPa) -14.5 to 21 (-100 to 150) -14.5 to 217 (-100 to 1500) 0 to 725 (0 to 5000) 0 to 3600 (0 to 25000) 0 to 8500 (0 to 60000) -14.5 to 21 (-100 to 150) -14.5 to 217 (-100 to 1500) 0 to 725 (0 to 5000) 0 to 3600 (0 to 25000) 0 to 8500 (0 to 60000) Calibrated Span (Min. to Max.) psi (kPa) 0.22 to 21 (1.5 to 150) 2 to 217 (15 to 1500) 7.25 to 725 (50 to 5000) 36 to 3600 (250 to 25000) 87 to 8700 (600 to 60000) 0.22 to 21 (1.5 to 150) 2 to 217 (15 to 1500) 7.25 to 725 (50 to 5000) 36 to 3600 (250 to 25000) 87 to 8700 (600 to 60000) Max. Pressure psi (bar) 58 (4) 580 (40) 2000 (138) 10000 (690) 11600 (800) 58 (4) 580 (40) 2000 (138) 10000 (690) 11600 (800) LCD Display No No No No No Yes Yes Yes Yes Yes ACCESSORIES Model A-630 A-631 BBV-0N DevCom2000 Description Stainless steel angle type bracket with SS bolts Stainless steel flat type bracket with SS bolts 2-valve block manifold HART® Communication Protocol Software 106 DWYER INSTRUMENTS, INC. | dwyer-inst.com HART® is a registered trademark of Hart Communication Foundation.

® SERIES 3400 SMART PRESSURE TRANSMITTER HART® Communication, Push-Button Configuration, Rangeability (Up to 100:1) E R U S S E R P 5-1/4 [132] 5-1/4 [133] 3-5/8 [91.5] 1-1/2 [38.5] 4 [102] 2 X M6 1/2˝ MALE NPT PROCESS CONNECTION SPECIFICATIONS Service: Compatible gases, steam, liquids or vapors. Wetted Materials: 316L SS. Accuracy: ±0.075% FS (@ 20°C). Rangeability: Up to 100:1 turn down. Stability: ≤0.075% FSO/3 years. Temperature Limits: Ambient: -40 to 185°F (-40 to 85°C); Process with -DS: -40 to 400°F (-40 to 204°C). Thermal Effect: < ±0.05% span/10°C. Power Requirements: 10-55 VDC. Output Signal: 4-20 mA. Response Time: 16 to 480 ms (programmable). Damping Time: 0 to 60 s. Electrical Connection: Packing gland M20x1.5, two 1/2˝ female NPT conduit, screw terminal. Process Connections: 1/2˝ female or male NPT. Enclosure Rating: NEMA 4X IP66/IP67. Agency Approvals: CE; -IS, -FP suffix: ATEX Compliant ia/db IIC T6/T5 Gb Ta<80°C, T5 / II 2D Ex ia/tb IIIC T85°C/T100°C Db. Type Certificate No. KDB 17ATEX0056X. ATEX Standards: EN 60079-0:2012+A11:2013, EN 60079-1:2014, EN 60079-11:2012, EN 60079-26:2015, EN 60079-31:2014 IECEx Compliant: Ex ia/db IIC T6/T5 Gb / Ex ia/tb IIIC T85°C/T100° Db. Certificate of Conformity IECEx KDB 17.0008X. IECEx Standards: IEC 60079-0:2011, IEC 60079-1:2014-06, IEC 60079-11:2011, IEC 60079-26:2006, IEC 60079-31:2013. 0518 II 2G V I DEO O N L I N E The Series 3400 Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push-button configuration, and is programmable using HART® Communication. The Series 3400 is capable of being configured with the zero and span buttons (a field calibrator is not required for configuration). The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3400 can be configured to be ATEX or IECEX approved for use in hazardous (classified) locations. The rangeability allows the smart transmitter to be configured to fit most applications. FEATURES/BENEFITS • High accuracy (±0.075% FS) • Rangeability (up to 100:1) • Configurable using zero/span buttons (no calibrator required) • Fail-mode process function • Automatic ambient temperature compensation APPLICATIONS • Water and wastewater • Chemical and petrochemical • Pulp and paper • Oil and gas • Food and beverage MODEL CHART Model 3400-AL-10-NM-2 3400-AL-13-NM-2 3400-AL-15-NM-2 3400-AL-20-NM-2 3400-AL-23-NM-2 Note: Bar ranges are also available. Range 0 to 15 psi 0 to 100 psi 0 to 350 psi 0 to 2300 psi 0 to 4350 psi Min. Set Range Overpressure limit 1.45 psi 1.45 psi 3.6 psi 14.5 psi 43.5 psi 30 psi 200 psi 725 psi 6525 psi 6525 psi s r e t t i l m s n a r T e r u s s e r P e g n S i 108 DWYER INSTRUMENTS, INC. | dwyer-inst.com HART® is a registered trademark of Hart Communication Foundation

® SERIES IS626 INTRINSICALLY SAFE PRESSURE TRANSMITTERS For Use In Hazardous Locations 1/4 NPT OR 1/4 BSPT 1-1/16 [26.99] HEX ø1 [25.40] 1/4 NPT OR 1/4 BSPT 1-1/16 [26.99] HEX ø1 [25.40] 5-1/16 [128.58] 5-21/32 [143.67] 5-3/16 [131.75] 6-1/4 [158.75] MAX Male NPT/BSPT connector with male M-12 connector Male NPT/BSPT connector with cable gland 1/4 NPT OR 1/4 BSPT FEMALE 1-1/16 [26.99] HEX ø1 [25.40] 1-1/16 [26.00] HEX ø1 [25.40] 1/4 NPT OR 1/4 BSPT FEMALE V I DEO O N L I N E 5-1/16 [128.58] 5-21/32 [143.67] 5-3/16 [131.76] 5-1/4 [158.75] Female NPT/BSPT connector with male M-12 connector Female NPT/BSPT connector with cable gland E R U S S E R P s r e t t i m s n a r T e r u s s e r P e g n S i l The Dwyer Series IS626 Intrinsically Safe Pressure Transmitters can be used to accurately measure compatible gases and liquids compatible with its 316/316L stainless steel wetted parts. Series IS626 full-scale accuracy is 0.25%. Designed for industrial environments with a NEMA 4X (IP66) housing, this transmitter resists most effects of shock and vibration. Models are available with a 3´ cable or M-12 4 pin connection. The IS626 is UL listed for use in Hazardous (Classified) Locations. The protection method is by Intrinsic Safety, “ia”. It was investigated by UL under UL Standard 913 Sixth Edition and CSA Standard No. 157-92. FEATURES/BENEFITS • Exceptional accuracy for insuring tight-control and minimizing costly out of specification conditions • NEMA 4x rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists • Robust sensor provides shock and vibration resistance insuring stability in controlling pressure for process applications APPLICATIONS • Monitoring pressure in hazardous environments • Process MODEL CHART SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Type 316, 316L SS. Accuracy: 0.25% FS. Temperature Limit: 0 to 176°F (-18 to 80°C). Compensated Temperature Range: 0 to 176°F (-18 to 80°C). Thermal Effect: ±0.02% FS/°F (includes zero and span). Pressure Limits: See Pressure Range Table. Power Requirements: 10-28 VDC. Output Signal: 4-20 mA. Response Time: 50 ms. Loop Resistance: 0-900 Ω max. Current Consumption: 38 mA (max). Electrical Connections: 3 ft cable or 4-pin M-12 connector. Process Connection: 1/4˝ male or female NPT and BSPT. Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Mount in any position. Weight: 8.9 oz (252 g). Agency Approvals: CE, cULus Intrinsically Safe to UL Standard 913. For use in Hazardous (Classified) Locations: Class I Div. 1 Groups A,B,C,D Class II Div. 1 Groups E,F,G Class III Div. 1 Temperature Code: T4 @ 80°C ambient Install in accordance with control drawing 01-700797-00. WARNING To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing. Use with approved safety barriers using entity evaluation. OPTIONS To order add suffix: Description -NIST Example: IS626-07-GH-P1-E1-S1-NIST NIST traceable calibration certificate ACCESSORIES Model A-295 A-231 MTL5541 MTL7706 Description Female four pin M-12 to cable gland connector 16´ (5 m) shielded cable with 4 pin female M-12 connection Galvanic barrier Intrinsically safe zener barrier Model IS626-07-GH-P1-E1-S1 IS626-08-GH-P1-E1-S1 IS626-09-GH-P1-E1-S1 IS626-10-GH-P1-E1-S1 IS626-11-GH-P1-E1-S1 IS626-12-GH-P1-E1-S1 IS626-13-GH-P1-E1-S1 IS626-14-GH-P1-E1-S1 Note: For optional M-12 4 pin electrical connection, change E1 to E6. Maximum Pressure (psig) 30 60 100 200 300 400 600 1000 Over Pressure (psig) 150 300 300 500 750 1000 1500 2500 Range 15 psig 30 psig 50 psig 100 psig 150 psig 200 psig 300 psig 500 psig 110 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® DIAL Thermometers E R U T A R E P M E T | I I E D U G N O T C E L E S SERIES Range Dial Size BT - page 116 0 to 1000°F 2˝, 3˝ or 5˝ BTLRN - page 116 0 to 200°F 3˝ ITA - page 117 -40 to 550°F 9˝ liquid filled linear scale Stem Length 2.5˝, 4˝ or 6˝ 12˝ to 72˝ 2-1/2˝ or 5˝ thermowell Process Connection 1/2˝ NPT; Back, Lower, or Adjustable mount 1/2˝ NPT; Back mount 3/4˝ NPT; Adjustable lower mount RRT3 - page 118 -40 to 300°F 3-1/2˝ with set point and SPDT output 3-1/8˝ remote stem with 10.5´ capillary 1/2˝ NPT; Remote mount BTO - page 118 0 to 550°F 3˝ or 5˝ with 4-20 mA temperature output 2-1/2˝, 4˝, 6˝, 9˝, or 12˝ 1/2˝ NPT; Adjustable mount LIMIT CONTROL Digital Temperature Switches SERIES Number of Temperature Units Temperature Input Type Digital Input Number of Relay Outputs Relay Type Approvals 16L - page 125 1 Thermocouple, RTD, voltage, or current No 1 or 2 2 SPST, 1 SPDT FM, UL TSF-DF - page 126 1 Type J, K, or S thermocouple Yes 1 SPST CE, UL TSF - page 126 1 Type J, K, or S thermocouple Yes 1 SPDT CE, FM, UL These Selection Guides are for quick comparison of similar products. Please refer to the catalog page number referenced for complete product information and specifications. DWYER INSTRUMENTS, INC. | dwyer-inst.com 112

E R U T A R E P M E T s n o i t a c i l Environmental chamber control simplified with digital zone control. Dwyer® controllers used within heater controllers. Environmental chambers have traditionally used separate controls to handle the temperature and relative humidity control tasks. The Love Controls® 32DZ dual zone control with Love® 5000 Series RTD and Dwyer® RH Humidity transmitter controls both parameters in a single small format (1/32 DIN) control to handle both zones, simplifying wiring and reducing panel costs. The 32DZ can switch small resistive loads directly or, when used with Dwyer® Series 62 solid state relays (not shown), can switch larger loads. In bioscience laboratories, the preferred methods of temperature control for experiments are heated water baths. There are experiments where water cannot be used, so the next feasible option is to send temperature controlled air to the experiment site. In order to use temperature controlled air, an air heater is needed. Within this product, a Love Controls® temperature controller is used for accurate and responsive temperature control. The Love Controls® controller can adapt to a different environment through different operating modes such as SELF-TUNE or manual PID adjustments, or preset PID responses. p p A i l a c p y T Love Controls® controllers involved in insulation removal. For most wires, removing the insulation is easy, but for magnetic and enamel wires, removing the insulation is very difficult. One way to easily remove the insulation of the magnetic or enamel wire is to dip them in a solution of molten fused salts. The salts are heated to a temperature high enough to melt the salts into a liquid, but not deteriorate them. This process uses a Love Controls® feedback temperature controller. The Love Controls® controller allows the operator to input a desired temperature and maintain that temperature accurately. The Love Controls® controller will also retain the input temperature after the power is disconnected. Series TS Digital Temperature Switches regulate temperature in refrigerated and display cases. When storing food or other perishables in chillers or display cases, temperature must be carefully regulated to ensure the products remain fresh. If the storage area rises above the critical preservation temperature, products can have their shelf life dramatically shortened or be spoiled altogether. A Dwyer® Series TSX3 Digital Temperature Switch will prevent these scenarios by monitoring temperature and activating refrigeration and defrost cycles to ensure the storage temperature stays within safe limits. 114 DWYER INSTRUMENTS, INC. | dwyer-inst.com

® SERIES BT BIMETAL THERMOMETER 2˝, 3˝ or 5˝ Dial, Dual Scale, ±1% FS Accuracy, External Reset E R U T A R E P M E T V I DEO O N L I N E The Series BT Bimetal Thermometer offers accurate, reliable service even in the toughest environments. These corrosion resistant units are constructed from stainless steel and are hermetically sealed to prevent crystal fogging. FEATURES/BENEFITS • Hermetically sealed • Adjustable dial position models APPLICATIONS • Chiller or boiler water temperature monitoring • Treatment plant temperature monitoring MODEL CHART 1/2 NPT STEM LENGTH 1/2 NPT STEM LENGTH HEAD SIZE Back connection Adjustable angle connection SPECIFICATIONS Wetted Materials: 304 SS. Housing Material: Series 300 SS. Lens: Glass. Accuracy: ±1% full-scale. Response Time: ≤ 40 s. Temperature Limits: Head: 200°F (93°C); Stem: Not to exceed 50% over-range or 1000°F (538°C) or 800°F (427°C) continuously. Process Connection: 1/4˝ NPT on 2˝ dial size; 1/2˝ NPT on 3˝ or 5˝ dial size. Stem Diameter: 1/4˝ OD. Immersion Depth: Minimum 2˝ in liquids, 4˝ in gas. Model BTB22551* Back BTB2405D Back BTB2409D Back BTB32510D Back BTB3255D Back BTB3257D Back BTB34010D Back BTB3405D Back BTB3407D Back *Model offered in Fahrenheit scale only. Stem Length Connection 2-1/2˝ 4˝ 4˝ 2-1/2˝ 2-1/2˝ 2-1/2˝ 4˝ 4˝ 4˝ Dial Size 2˝ 2˝ 2˝ 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ Range °F (°C) 0 to 250 0 to 250 (-20 to 120) 200 to 1000 (100 to 550) 0 to 200 (-20 to 100) 0 to 250 (-20 to 120) 50 to 550 (10 to 290) 0 to 200 (-20 to100) 0 to 250 (-20 to 120) 50 to 550 (10 to 290) Degree Div °F (°C) 2 2 (2) 10 (5) 2 (2) 2 (2) 5 (5) 2 (2) 2 (2) 5 (5) Model BTB3605D BTA54010D BTA5405D BTA5407D BTA56010D BTA5605D BTA5607D BTC3255D Dial Size 3˝ 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ 3˝ Stem Length Connection 6˝ 4˝ 4˝ 4˝ 6˝ 6˝ 6˝ 2-1/2˝ Back Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Lower Range °F (°C) 0 to 250 (-20 to 120) 0 to 200 (-20 to 100) 0 to 250 (-20 to 120) 50 to 550 (10 to 290) 0 to 200 (-20 to 100) 0 to 250 (-20 to 120) 50 to 550 (10 to 290) 0 to 250 (-20 to 120) Degree Div °F (°C) 2 (2) 2 (2) 2 (2) 5 (5) 2 (2) 2 (2) 5 (5) 2 (2) SERIES BTLRN LONG REACH BIMETAL THERMOMETER Extra-long Stems Reach Remote Areas, Gripping Handle Available , s r e t e m o m r e h T l i a D V I DEO O N L I N E 3/4 [19.05] Ø3-5/16 [Ø84.14] 7/8 HEX [22.23 HEX] 5-61/64 [151.21] Ø13/32 [Ø10.32] 1/2 NPT 2-5/8 [66.68] 9/32 [7.14] STEM LENGTH 1-27/64 [36.12] 1/2 NPT CONNECTION The Series BTLRN Long Reach Bimetal Thermometer reaches areas that other thermometers can’t. A gripping handle is available as an accessory to comfortably hold the thermometer during temporary installations. FEATURES/BENEFITS • Stem lengths from 12˝ to 72˝ APPLICATIONS • Large container monitoring • Duct temperature measurement SPECIFICATIONS Wetted Materials: 304 SS. Housing Materials: Series 300 SS. Lens: Glass. Accuracy: ±1%. Temperature Limits: Ambient: -40 to 392°F (-40 to 200°C). Dial Size: 3˝. Process Connection: 1/2˝ NPT. Resolution: 2°F (1°C). Weight: 1.0 lb (0.45 kg). MODEL CHART Model BTLRN312101 BTLRN318101 BTLRN324101 BTLRN336101 BTLRN348101 BTLRN360101 BTLRN372101 *Dual scale units available by changing last digit to D. Example: BTLRN31210D Stem Length Range* 12˝ 18˝ 24˝ 36˝ 48˝ 60˝ 72˝ 0 to 200°F 0 to 200°F 0 to 200°F 0 to 200°F 0 to 200°F 0 to 200°F 0 to 200°F ACCESSORIES Model BTLR-GH Gripping handle Description 116 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U T A R E P M E T s r e t e m o m r e h T h c t i w S / r e t t i m s n a r T h t i w ® SERIES BTO BIMETAL THERMOMETER WITH TRANSMITTER OUTPUT Bimetal Stem with 4-20 mA Output, 3˝ or 5˝ Dial Ø3-1/4 [Ø82.55] OR Ø5-1/4 [Ø133.35] The Series BTO Bimetal Thermometer with Transmitter Output eliminates the need for a separate thermometer and transmitter. FEATURES/BENEFITS • Thermometer and transmitter in one device • Weatherproof construction APPLICATIONS • Boilers • Compressors • Thermal oxidizers 3-5/16 [84.14] Ø3-1/16 [Ø77.79] 2-15/16 [71.61] 7-1/8 [180.98] 1/2 NPT STEM LENGTH 3/4 NPT CONDUIT CONNECTION 3-3/16 [80.96] Ø1/4 [Ø6.35] SPECIFICATIONS THERMOMETER SPECIFICATIONS Wetted Materials: 304 SS. Housing Material: 304 SS. Lens: Glass. Accuracy: ±1% FS. Temperature Limits: Ambient: -58 to 185°F (-50 to 85°C). Dial Size: 3˝ or 5˝. Process Connection: 1/2˝ NPT. Resolution: 2°F (5°F for 400°F and 550°F models). Weight: 1.95 lb. TRANSMITTER SPECIFICATIONS Temperature Limits: Ambient: -58 to 185°F (-50 to 85°C). Power Requirement: 10-33 VDC. Output Signal: 4-20 mA. Loop Resistance: 1045 Ω. Power Consumption: 38 mA. Enclosure Rating: NEMA 4X (IP66). MODEL CHART Model BTO32551 BTO32571 BTO34051 BTO34071 BTO36051 BTO36071 BTO39051 BTO39071 BTO31251 BTO31271 Note: -40 to 160°F, 0 to 200°F, 50 to 300°F, and 50 to 400°F ranges available, contact factory for more information. Dial Size Stem Length 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ 5˝ Range 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F Dial Size 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ 3˝ Stem Length Range 2.5˝ 2.5˝ 4˝ 4˝ 6˝ 6˝ 9˝ 9˝ 12˝ 12˝ 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F 0 to 250°F 50 to 550°F Model BTO52551 BTO52571 BTO54051 BTO54071 BTO56051 BTO56071 BTO59051 BTO59071 BTO51251 BTO51271 2.5˝ 2.5˝ 4˝ 4˝ 6˝ 6˝ 9˝ 9˝ 12˝ 12˝ USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov SERIES RRT3 REMOTE READING THERMOMETER WITH SWITCH SPDT Relay, Liquid Actuated Bulb and Capillary 7/16 [11.00] 3-33/64 [89.50] 3-1/32 [77.00] 3-5/32 [80.00] The Series RRT3 Remote Reading Thermometer with Switch combines an easy to read 3-1/4˝ dual scale dial thermometer and a SPDT relay. Color coordinated pointers display the current process temperature and set point. FEATURES/BENEFITS • Quick connect electrical terminals • Industrial armored capillary APPLICATIONS • HIgh temp shut down in process applications • Boiler or chiller control MODEL CHART Model RRT3120U RRT3250U RRT3300U Temperature Ranges -40 to 120°F (-40 to 50°C) 32 to 248°F (0 to 120°C) 0 to 300°F (-18 to 149°C) 118 DWYER INSTRUMENTS, INC. | dwyer-inst.com 3-23/64 [85.51] 3-1/8 [79.24] SPECIFICATIONS Wetted Materials: 304 SS. Accuracy: ±3% FS. Housing Material: 304 SS. Temperature Limit: -4 to 158°F (-20 to 70°C). Switch Type: SPDT. Electrical Ratings: 3 A @ 250 VAC, .2 A @ 250 VDC. Electrical Connections: Screw terminal. Process Connection: 1/2˝ (12.7 mm) male NPT. Dial Size: 3-1/2˝ (90 mm). Capillary Length: 10.5´ (3.2 m). Bulb Length: 3-1/8˝ (79.24 mm). Weight: 2 lb (900 g). USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

® SERIES 32B, 16B, 8B, & 4B TEMPERATURE/PROCESS LOOP CONTROLLERS Universal Input, Dual Control Output, RS-485 Communication 1-49/64 [44.75] 15/16 [24.00] 1-57/64 [48.00] E R U T A R E P M E T / e r u t a r e p m e T s r e l l o r t n o C s s e c o r P 32B 16B 8B 4B 9/64 [3.40] 3-59/64 [99.80] 55/64 [21.85] 32B 1-57/64 [48.00] 1-49/64 [44.75] 1-57/64 [48.00] 3/8 [9.50] 3-5/32 [80.00] 16B 1-3/4 [44.00] 3-7/8 [98.20] 3-49/64 [95.70] 1-7/8 [47.80] 3-37/64 [91.00] 1/2 [12.80] 8B 3-1/8 [79.20] 3-25/32 [96.00] 3-27/32 [97.63] 3-9/16 [90.81] 3-25/32 [96.00] 5/8 [15.80] 4B 3-1/8 [79.2] SPECIFICATIONS Inputs: Thermocouple, RTD, DC voltages or DC current. Display: Two 4 digit, 7 segment LED’s. PV: Red, SV: Green. Accuracy: ±0.25% span, ±1 least significant digit. Power Requirements: 100-240 VAC, 50/60 Hz; Optional 24 VDC. Power Consumption: 5 VA max. Operating Temperature: 32 to 122°F (0 to 50°C). Memory Backup: Nonvolatile memory. Control Output Ratings: Relay: SPST, 3 A @ 250 VAC resistive for 32B; SPST, 5 A @ 250 VAC resistive for 16B; SPDT, 5 A @ 250 VAC resistive for 8B and 4B; Voltage pulse: 14 VDC (max. 40 mA); Current: 4-20 mA; Linear voltage: 0-10 V. Communication: RS-485 Modbus® ASCII/RTU communication protocol. Weight: 32B and 16B: 4 oz (114 g); 8B and 4B: 15 oz (425 g). Front Panel Rating: IP56. Agency Approvals: CE, cULus. Modbus® is a registered trademark of Schneider Automation, Inc. The SERIES 32B, 16B, 8B, & 4B Temperature/Process Loop Controllers offer advanced control features for the most demanding temperature or process applications. Offered in 4 standard DIN cutout housing sizes, these controllers are designed with dual, 4 digit LED displays for local indication of the process value, set point, and output conditions. FEATURES/BENEFITS • Universal input accepts process transmitters, RTD’s or thermocouple signals • On/off, PID, or manual output control • RS-485 standard on all models • Stage control program for up to 64 ramp/soak actions APPLICATIONS • Oven, boiler, or chiller control • Environmental chambers • Hot plates/melt pots • Medical equipment • Packaging equipment • Food service equipment 120 DWYER INSTRUMENTS, INC. | dwyer-inst.com

E R U T A R E P M E T / e r u t a r e p m e T s r e l l o r t n o C s s e c o r P ® SERIES 16G, 8G, & 4G TEMPERATURE/PROCESS LOOP CONTROLLERS Universal Input, Dual Output, On/Off PID or FUZZY Logic Output Control 1-57/64 [48.00] 17/64 [6.70] 3-7/16 [87.50] 1-3/4 [44.75] 1-57/64 [48.00] 1-49/64 [44.75] 2-55/64 [72.78] 11/16 [17.55] 16G 4-21/64 [110.06] 5-53/64 [148.03] 5-33/64 [140.07] 3-25/32 [95.92] [LED SCREEN] 3-25/32 [96.01] 8G 2-53/64 [71.66] 4G 3-37/64 [91.00] 2-45/64 [68.67] 3-39/64 [91.49] 16G 8G 4G The Series 16G, 8G, & 4G Temperature/Process Loop Controllers allow for monitoring and control of temperature or process conditions. The controller features two independent control outputs for dual loop control using on/off, auto-tune or self- tune PID, fuzzy logic, or manual control methods. RS-485 interface is included with Modbus® communication protocol, for easy bench-top configuration or integration with a PLC or data control system. FEATURES/BENEFITS • On/off, PID, fuzzy logic, or manual output control • Constant, sloped, program (ramp/soak), or remote set point control • 2 primary control outputs, 2 secondary/alarm relay outputs, and RS-485 standard on all models • Remote set point, input retransmission, or event input functions available with optional hardware APPLICATIONS • Oven control • Packaging equipment • Parts washers SPECIFICATIONS Inputs: Thermocouple, RTD, DC voltages or DC current. Display: Process value: 4 digit, 0.47˝ H (12mm), orange LCD; Set point value: 4 digit, 0.47˝ H (12mm), green LCD. Accuracy: ± 1.8°F plus ±0.3% of span (±1°C plus ±0.3% of span) at 77°F (25°C) after 20 minutes warm up. Power Requirements: 100-240 VAC -20/+8%, 50/60 Hz; Optional 24 VDC, ±10%. Power Consumption: 5 VA max. Operating Temperature: 32 to 122°F (0 to 50°C). Storage Temperature: -42 to 150°F (-20 to 65°C). Memory Backup: Nonvolatile memory. Control Output Ratings: Relay: SPST, 5 A @ 250 VAC resistive; Voltage pulse: 12 V (max. 40 mA); Current: 4-20 mA; Linear voltage: 0-10 V. Alarm Relay Ratings: 3 A @ 250 VAC resistive. Communication: RS-485 Modbus® ASCII/RTU communication protocol. Weight: 9 oz (255g). Front Panel Rating: IP66. Agency Approvals: CE, cULus. 122 DWYER INSTRUMENTS, INC. | dwyer-inst.com Modbus® is a registered trademark of Schneider Automation, Inc.

E R U T A R E P M E T s r e l l o r t n o C e r u t a r e p m e T l i a R N D I ® SERIES SCD DIN RAIL TEMPERATURE/PROCESS CONTROLLERS Universal Inputs, Up to 8 PID Loops, Modbus® Communications 2-1/4 [57.15] MASTER EXTENSION PORT Master controller Slave controller The Series SCD DIN Rail Temperature/Process Controllers offer multiple PID loops in a compact size. Each SCD-1000 master controller can be combined with up to seven SCD-2000 slave controllers without any wires. Each controller has one universal input, one relay output and one user selected output. FEATURES/BENEFITS • Expandable from 1 to 8 process control loops • Universal transmitter or temperature sensor inputs • RS-485 Modbus® communication • Dual loop or single loop/alarm output control APPLICATIONS • Oven, boiler, or chiller control • Hot plates/melt pots • Packaging equipment • Environmental chambers • Medical equipment • Food service equipment MODEL CHART Model SCD-1023 SCD-1033 SCD-1053 SCD-1063 SCD-2023 SCD-2033 SCD-2053 SCD-2063 *DC current input requires 250 Ω precision resistor Controller Output 1 Master Master Master Master Slave Slave Slave Slave Voltage pulse Relay Current Linear voltage Voltage pulse Relay Current Linear voltage Output 2 Relay Relay Relay Relay Relay Relay Relay Relay 3-35/64 [90.09] 1 [25.4] 3-13/16 [96.84] SLAVE EXTENSION PORT SPECIFICATIONS Inputs: Thermocouple, RTD, DC linear voltage, and DC currents.* Supply Voltage: 24 VDC. Power Consumption: 3 W. Operating Temperature: 32 to 122ºF (0 to 50ºC). Memory Backup: Non-volatile. Control Output Ratings: Relay: 3 A @ 250 VAC resistive; Voltage pulse: 12 VDC, max. output current: 40 mA; Current: 4-20 mA output; Linear voltage: 0-10 VDC. Communication: RS-485 Modbus® A-5-11/RTU communication protocol. Weight: 2.7 oz (76.5 g). Agency Approvals: CE, cULus. ACCESSORIES Model SCD-PS SCD-SW A-277 MN-1 A-600 Description 100-240 VAC/VDC to 24 VDC power supply Configuration software 250 ohm precision resistor Mini-Node™ USB/RS-485 converter R/C snubber Modbus® is a registered trademark of Schneider Automation, Inc. SERIES TSDIN DIN RAIL MOUNT TEMPERATURE SWITCH HACCP Alarm Logging, Intelligent Defrost 2-7/16 [61.82] 1-25/32 [45.06] 1-1/32 [26.31] 1-1/4 [31.83] 1-7/8 [47.57] 2-9/32 [58.00] 13/64 [5.08] 3/16 [4.57] 2-51/64 [71.20] 4-1/64 [101.96] 3-35/64 [90.00] The Series TSDIN DIN Rail Mount Temperature Switch is ideally designed to control compressor, defrost, and fan cycles in refrigeration applications. The digital input can be used to remotely trigger a defrost cycle, monitor cooler door status, or act as an external alarm. Three other probe inputs measure cabinet, defrost, and product temperature. Programming performed on the 6 button keypad or with the Model TS2-K configuration key. FEATURES/BENEFITS • 3 temperature probe inputs • Real-time clock used for HACCP logging of temperature limit alarms or loss of power • Intelligent Defrost parameters manage defrost cycle in order to save energy cost APPLICATIONS • Refrigerated cabinets • Walk in coolers • Applications requiring defrost cycles MODEL CHART Model TSDIN-013 TSDIN-015 TSDIN-023 TSDIN-025 TSDIN-033 TSDIN-043 TSDIN-213 TSDIN-215 TSDIN-223 TSDIN-225 TSDIN-233 TSDIN-243 Supply Power # of Outputs Display Color 115 VAC 115 VAC 230 VAC 230 VAC 12 VAC/VDC 24 VAC/VDC 115 VAC 115 VAC 230 VAC 230 VAC 12 VAC/VDC 24 VAC/VDC 1, 2, 3 1, 2, 3, 4, 5 1, 2, 3 1, 2, 3, 4, 5 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3, 4, 5 1, 2, 3 1, 2, 3, 4, 5 1, 2, 3 1, 2, 3 Red Red Red Red Red Red Blue Blue Blue Blue Blue Blue 124 DWYER INSTRUMENTS, INC. | dwyer-inst.com SPECIFICATIONS Probe Range: PTC: -58 to 302°F (-50 to 150°C); NTC: -58 to 230°F (-50 to 110°C). Input: PTC/NTC. Output: Output 1: SPST relay rated 16A @ 240 VAC resistive, 10 FLA, 60 LRA, 1HP @ 240 VAC inductive; Output 2: SPDT relay rated 8A @ 240 VAC resistive; Output 3: SPST relay rated 8A @ 240 VAC resistive; Output 4: SPDT relay rated 8A @ 240 VAC resistive; Output 5: SPST relay rated 16A @ 240 VAC resistive, 10 FLA, 60 LRA, 1HP @ 240 VAC inductive. Control Type: On/off. Power Requirement: 115 VAC, 230 VAC, 12 VAC/VDC, 24 VAC/VDC (±10% depending on model. Power Consumption: 6 VA. Accuracy: Better than 1% of full-scale. Display: 3-digits plus sign. Resolution: 0.1°. Memory Backup: Non-volatile memory. Temperature Limits: Operating: 32 to 131°F (0 to 55°C); Storage: -4 to 176°F (-20 to 80°C). Weight: 10.8 oz (306 g). Agency Approvals: CE, cURus. ACCESSORIES See page reference u below. uDigital Temperature Switch Probes and Accessories: See page 131 (Series TS-Probes)

® SERIES TSF THERMOCOUPLE LIMIT CONTROL FM Approved Temperature Limit Control E R U T A R E P M E T The Series TSF Thermocouple Limit Control provides audible alarm status along with a relay output. Unit allows the user to easily select automatic or manual reset via a built in reset button on the front panel or an external contact. FEATURES/BENEFITS • FM approved temperature limiting control • Integral and remote reset capabilities APPLICATIONS • Gas fired oven and burner control MODEL CHART Model TSF-4010 TSF-4011 TSF-4021 TSF-4040 Supply Power Unit 115 VAC 115 VAC 230 VAC 24 VAC/VDC °F °C °C °F 1-3/8 [33.99] 1-1/8 [27.94] 3 [76.20] 2-3/8 [60.33] Panel cutout 2-51/64˝ x 1-9/64˝ (71 x 29 mm) SPECIFICATIONS Probe Range: 32 to 999°F (0 to 700°C) for Type J thermocouple; 32 to 999°F (0 to 999°C) for type K or S thermocouples. Input: Type J, K or S thermocouple. Output: SPDT relay rated 16 A @ 240 VAC resistive. Horsepower Rating (HP): 1 HP. Control Type: ON/OFF; manual/ automatic reset. Power Requirements: 115 VAC, 230 VAC, 12 VAC/VDC or 24 VAC/VDC (depending on model). Power Consumption: 4 VA. Accuracy: ±1% FS. Display: 3-digit, red, 1/2˝ (12.7 mm) digits, plus sign. Resolution: 1°. Memory Backup: Nonvolatile memory. Temperature Limits: Ambient: 32 to 150°F (0 to 65°C); Storage: -4 to 176°F (-20 to 80°C). Weight: 2.3 oz (65 g). Front Panel Rating: IP64 (NEMA 3R). Agency Approvals: CE, FM, cURus. , s e h c t i w S e r u t a r e p m e T t i m L i ACCESSORIES See page reference u below. uDigital Temperature Switch Probes and Accessories: See page 131 (Series TS-Probes) SERIES TSF-DF THERMOCOUPLE LIMIT CONTROL UL Approved Temperature Limit Control The Series TSF-DF Thermocouple Limit Control is a UL approved temperature limit control that provides visual alarm status along with a `relay output. The Series TSF- DF controls have a built in reset button on the front panel or can accept an external reset signal. Program settings on model TSF-DF controls cannot be changed through the buttons on the device. It is necessary to purchase a model TSF-MDF and a model TS2-K in addition to the model TSF-DF. Desired program parameters are entered on a TSF- MDF programming control. Using the TS2-K configuration key, the parameters can be easily copied from the TSF-MDF and transferred to the TSF-DF Limit Alarms. FEATURES/BENEFITS • UL approved limit control APPLICATIONS • Gas fired oven and burner control MODEL CHART Model TSF-4010-DF TSF-4011-DF TSF-4021-DF TSF-4040-DF TSF-4010-MDF TSF-4011-MDF TSF-4021-MDF TSF-4040-MDF Control Limit alarm Limit alarm Limit alarm Limit alarm Programming control Programming control Programming control Programming control Supply Power Unit 115 VAC 115 VAC 230 VAC 24 VAC/VDC 115 VAC 115 VAC 230 VAC 24 VAC/VDC °F °C °C °F °F °C °C °F 126 DWYER INSTRUMENTS, INC. | dwyer-inst.com 1-3/8 [33.99] 1-1/8 [27.94] 3 [76.20] 2-3/8 [60.33] Panel cutout 2-51/64˝ x 1-9/64˝ (71 x 29 mm) SPECIFICATIONS Probe Range: 32 to 999°F (0 to 700°C) for thermocouple J type; 32 to 999°F (0 to 999°C) for thermocouple K or S type. Input: Type J, K, or S thermocouple. Output: NO SPST relay rated 16 A @ 240 VAC resistive. Horsepower Rating (HP): 1 HP. Control Type: ON/OFF; manual/automatic reset. Power Requirements: See model chart. Power Consumption: 4 VA @ 230 VAC. Accuracy: ±1% FS. Display: 3-digit, red, 1/2˝ (12.7 mm) digits, plus sign. Resolution: 1°. Memory Backup: Nonvolatile memory. Ambient Operating Temperature: 32 to 140°F (0 to 60°C). Storage Temperature: -4 to 176°F (-20 to 80°C). Weight: 2.3 oz (65 g). Front Panel Rating: IP64. Agency Approvals: CE, cURus (DF models only). ACCESSORIES See page reference u below. uDigital Temperature Switch Probes and Accessories: See page 131 (Series TS-Probes)

® SERIES TST DIGITAL TEMPERATURE SWITCH Heating and Cooling Control, 16 Amp Rating V I DEO O N L I N E The Series TST Digital Temperature Switch is designed with many heating and cooling applications in mind. This low cost switch is simple to set up with one probe input and SPDT switch output. Programming performed using either the front keypad or through a TS2-K programming key. FEATURES/BENEFITS • Buzzer indicates probe/memory error or high/low temperature alarm conditions • Capacitive buttons offer clean panel face design 3.110 [79.0] 2.440 [62.0] GASKET AUX SET 1.440 [36.5] 1.110 [28.3] Panel cutout 2-51/64˝ x 1-9/64˝ (71 x 29 mm) SPECIFICATIONS Probe Range: PTC: -58 to 302°F (-50 to 150°C); NTC: -58 to 230°F (-50 to 110°C). Input: PTC (1000 Ω @ 25°C) or NTC (10 KΩ @ 25°C) thermistor. Output: SPDT relay rated 16 A @ 240 VAC resistive, 10 FLA, 60 LRA. Horsepower Rating (HP): 1 HP. Control Type: On/Off. Power Requirements: 115 VAC, 230 VAC, 24 VAC/VDC, or 12 VAC/VDC. Power Consumption: 4 VA @ 115/230 VAC; 1.5 VA @ 12/24 VAC/VDC. Accuracy: ±1% FS. Display: 3-digit, plus sign. Resolution: 0.1°. Memory Backup: Nonvolatile memory. Ambient Temperature: 32 to 131°F (0 to 55°C). Storage Temperature: -4 to 176°F (-20 to 80°C). Weight: 115 and 230 V models: 7.2 oz (204 g); 12 and 24 V models: 4.8 oz (136 g). Front Panel Rating: IP65. Agency Approvals: CE, cURus. ACCESSORIES See page reference u below. uDigital Temperature Switch Probes and Accessories: See page 131 (Series TS-Probes) DIGITAL TEMPERATURE SWITCH Refrigeration Control, Up To 3 Probe Inputs and 3 Relay Outputs E R U T A R E P M E T , s e h c t i w S e r u t a r e p m e T l a t i g D i APPLICATIONS • Refrigeration • Holding ovens • Boilers • Brewing systems MODEL CHART Model TST-011 TST-021 TST-031 TST-041 Supply Power 115 VAC 230 VAC 12 VAC/VDC 24 VAC/VDC SERIES TSXT 3.110 [79.0] 2.440 [62.0] GASKET AUX SET 1.440 [36.5] 1.110 [28.3] Panel cutout 2-51/64˝ x 1-9/64˝ (71 x 29 mm) SPECIFICATIONS Probe Range: PTC: -58 to 302°F (-50 to 150°C); NTC: -58 to 230°F (-50 to 110°C). Input: PTC (1000 Ω @ 25°C) or NTC (10 KΩ @ 25°C) thermistor. Output: Relay 1: SPST relay rated 16 A @ 240 VAC resistive, 10 FLA, 60 LRA; Relay 2: SPST relay rated 5 A @ 240 VAC resistive; Relay 3: SPST relay rated 8 A @ 240 VAC resistive. Horsepower Rating (HP): 1 HP (Relay 1). Control Type: On/off with defrost options. Power Requirements: 115 VAC, 230 VAC, 24 VAC/VDC, or 12 VAC/VDC. ACCESSORIES See page reference u below. Power Consumption: 3.6 VA @ 115/230 VAC; 1.5 VA @ 12/24 VAC/VDC. Accuracy: ±1% FS. Display: 3-digit, plus sign. Resolution: 0.1°. Memory Backup: Nonvolatile memory. Ambient Operating Temperature: 32 to 131°F (0 to 55°C). Storage Temperature: -4 to 176°F (-20 to 80°C). Weight: 115 and 230 V models: 7.2 oz (204 g); 12 and 24 V models: 4.8 oz (136 g). Front Panel Rating: IP65. Agency Approvals: CE, cURus. uDigital Temperature Switch Probes and Accessories: See page 131 (Series TS-Probes) The Series TSXT Digital Temperature Switch is designed for refrigeration control. It accepts PTC or NTC temperature probe types and can control the compressor, defrost, fan, alarm, and light in a refrigeration system. Master/slave configurations allow synchronization of defrost cycles between different units. Programming is performed through the front keypad, or by using the TS2-K programming key. FEATURES/BENEFITS • Models available with 1, 2, or 3 relay outputs • 3 temperature inputs and one digital input for complete refrigeration control • Configuration key available for programing multiple units • Capacitive buttons offer clean panel face design APPLICATIONS • Refrigerated cabinets • Walk in coolers • Applications requiring defrost cycles MODEL CHART Model TSXT-211 TSXT-221 TSXT-231 TSXT-241 TSXT-212 TSXT-222 Supply Power 115 VAC 230 VAC 12 VAC/VDC 24 VAC/VDC 115 VAC 230 VAC Outputs Model 1 1 1 1 2 2 TSXT-232 TSXT-242 TSXT-213 TSXT-223 TSXT-233 TSXT-243 Supply Power 12 VAC/VDC 24 VAC/VDC 115 VAC 230 VAC 12 VAC/VDC 24 VAC/VDC Outputs 2 2 3 3 3 3 128 DWYER INSTRUMENTS, INC. | dwyer-inst.com