Founded in 1931, Dwyer is recognized for quality, reliability, and readily available low cost products. As a leading manufacturer in the controls and instrumentation industry, Dwyer serves the HVAC, chemical, food, oil & gas, and pollution control industries. Dwyer continues to develop brand such as the Magnehelic® differential pressure gauges, Photohelic® pressure switch/gauges, Rate Master® flowmeters, and Hi-Flow® valves.

Dwyer has made several acquisitions such as Mercoid Controls, Love Controls, W.E. Anderson and Proximity Controls to further build on its solid reputation. This positions the company as a provider of knowledgeable, prompt, and courteous customer service.

Digital Pressure Gauges

Series DPG

Dwyer

Features: The Series DPG has a high ±0.25% or ±0.5% full-scale accuracy. The 4 digit digital display will reduce the potential for errors in readings by eliminating parallax error commonly produced with analog gages. Series DPG is battery powered and has an auto-shut off to conserve battery life.

Digital pressure gage, selectable engineering units: 200.0 psi, 14.06 kg/cm², 13.79 bar, 407.2″ Hg, 461.4 ft w.c., 1379 kPa, 3200 oz/in², 5536″ w.c.

Gauges - Differential

Series 2000 Magnehelic Gauge

Dwyer

Features: SERIES 2000 Magnehelic® Gage for high accuracy–guaranteed within 2% of full scale–and for the wide choice of 81 models available to suit your needs precisely. Using Dwyer’s simple, frictionless Magnehelic® gage movement, it quickly indicates low air or non-corrosive gas pressures–either positive, negative (vacuum) or differential. The design resists shock, vibration and over-pressures.

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 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.

Switches - Differential

Series A3000 Photohelic Switch/Gages

Dwyer

Features: SERIES A3000 Photohelic® Switch/Gages function 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.

SERIES A3000 Photohelic® Switch/Gages function 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.

Transmitters - Differential

Series 605 Magnehelic DP Transmitter

Dwyer

Features: SERIES 605 Magnehelic® 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.

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 to 35 VDC (2-wire).
Output Signal: 4 to 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.

Transmitters - Level

Series ULT Ultrasonic Level Transmitter

Dwyer

Features: Series ULT Ultrasonic Level Transmitter provides reliable, accurate, non-contact measurement of liquid levels. Ultrasonic non-contact technology offers no moving parts to wear, jam, corrode, or get coated like contact technologies. Mapping software makes effective measuring surface only a 3″ diameter column. No concerns with ladders, pipes, or other tank intrusions in the remaining sound cone.

Wetted Materials:Sensor: PVDF; Process Connection: 303 SS; O-ring: fluoroelastomer.Ranges:24.6′ (7.5 m), 32.8′ (10 m).Accuracy:±0.2% FS.Resolution:0.079″ (2 mm)Blind Zone:Under 8″ (20 cm).Beam Width:3″ (7.6 cm) diameter.Temperature Limits:Ambient: -40 to 140°F (-40 to 60°C), Process: -4 to 140°F (-20 to 60°C).Temperature Compensation:-40 to 140°F (-40 to 60°C).Pressure Limits:30 psi (2 bar) up to 25°C (77°C). Above 25°C (77°F), rating decreases 1.667 psi per 1°C increase. See Catalog page.Power Requirement:18 to 28 VDC (2 wire).Output Signal:4 to 20 mA or 20 to 4 mA (Two-wire).

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