Dwyer Instruments Inc.


Since the company was founded in 1931, customers have come to recognize Dwyer Instruments to stand for quality, reliability, and readily available low cost 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, food, oil and gas, and pollution control. New applications are discovered daily through a cooperative effort between Dwyer and its customers. It has been these relationship ...
Phone 219/879-8000
Fax 219/872-9057
Address P.O. Box 373, 102 Indiana Hwy. 212
Michigan City , IN 46361
United States
Email lit@dwyer-inst.com
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  • CS - OEM Pressure Switch Series CS and CD combine advanced design and precision construction with small size and low price. Unit is ideal for instrument panels, small compressors and general industrial applications.
    Dwyer Instruments
  • 2000 - Magnehelic Differential Pressure Gage Select the 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
    Dwyer Instruments
  • 476A & 478A - Digital Manometer Digital manometer, range -20 to 20" w.c.
    Dwyer Instruments
  • 7000 - Spirahelic Pressure Gage Not just another pretty gage, the Series 7000 Spirahelic Direct Drive Pressure Gages were originally developed in response to military needs for unbelievable resistance to shock and vibration while delivering premium accuracy.
    Dwyer Instruments
  • A1VS - OEM Pressure Switch Series A1PS/A1VS Economical Pressure Switches are designed with a 15 Amp SPDT switch for direct control of pumps and motors. Available in pressure, vacuum, or compound ranges, the switches offer a field adjustable set point.
    Dwyer Instruments
  • UGF - Utility Pressure Gage The Series UGF Utility Gages possess dual psi and bar (100 x kPa) scales with 3-2-3% ANSI B40.1 Grade B accuracy. The 2.5" UGF gages are designed with black steel housings and chrome bezels. Wetted parts include a brass socket and Phosphor Bronze Bourdon tube.
    Dwyer Instruments
  • A4 - Gas Differential Pressure Switch Rugged Series A4 Differential Pressure Switch offers field adjustments and can handle system pressures up to 6000 psig. Piston design allows mounting in any orientation. The switch is capable of carrying moderate shock and vibratory loads
    Dwyer Instruments
  • 250-AF - Inclined Manometer Air Filter Gages Dwyer Durablock Series 250-AF Gages are precision machined 1" thick solid acrylic plastic, virtually unbreakable and free of distortion. The fluid bore is precision drilled to ±.0002" to assure life long accuracy.
    Dwyer Instruments
  • SGO - Stainless Steel Schaeffer Gage The Series SGO Gages have dual English/metric scales with ±1.6% full scale accuracy. The Series SGO gages are designed with 304 SS housing, a 316L SS chamber and PTFE coated diaphragm for excellent chemical compatibility
    Dwyer Instruments
  • 7000B - Spirahelic Pressure Gage Series 7000B Spirahelic Direct Drive Pressure Gages with turret mount housings feature a triple coil spiral/helical wound Bourdon tube to provide dependable service. Bourdon tube design eliminates gears, springs, linkages and complex movements which can wear and cause inaccuracy or early failure.
    Dwyer Instruments
  • LCR20 - Circular Chart Recorder The Series LCR20 Dueal Pen Circular Chart Recorder offers a wide range of features in an easy to use package. The large 10" (254 mm) Circular chart allows easy reading of your data. Available in clockwise and counter clockwise rotation, the LCR20 is compatible with Honeywell and Partlow circular charts.
    Dwyer Instruments
  • 605 - Indicating Differential Pressure Transmitter The Series 605 Magnehelic Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure.
    Dwyer Instruments
  • APS - Adjustable Pressure Switch Miniature Series APS/AVS Adjustable Switches offer reliable switching for pressure/vacuum alarm, shutdown or control. The units are readily adjustable throughout their range using the locking adjusting ring and indicating pointer.
    Dwyer Instruments
  • 636 - Fixed Range Pressure Transmitter The Series 636 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
    Dwyer Instruments
  • 1235 - Flex-Tube Well-Type Manometer Dwyer 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
    Dwyer Instruments
  • AVS - OEM Pressure Switch Miniature Series APS/AVS Adjustable Switches offer reliable switching for pressure/vacuum alarm, shutdown or control. The units are readily adjustable throughout their range using the locking adjusting ring and indicating pointer.
    Dwyer Instruments
  • DH - Digihelic Differential Pressure Controller The Series DH Digihelic Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money.
    Dwyer Instruments
  • 636D - Differential Pressure Transmitter The Series 636D Differential Pressure Transmitter can be used for measuring pressures of liquids, gases & vapors. All available ranges have an excellent 0.5% F.S. accuracy with a 4-20 mA Output standard or optional 1-5 VDC output.
    Dwyer Instruments
  • AP - Diaphragm Operated Pressure Switch Reliable and convenient, series AP pressure switch is a compact low cost switch for instrument air or other low pressure applications. Visible set point and external adjustment add convenience.
    Dwyer Instruments
  • SGD - Industrial Pressure Gage - The Series SGD Gages have dual English/metric scales with ±1.6% full scale accuracy. The Series SGD gages are designed with 304 SS housings and 316 SS wetted parts for excellent chemical compatibility.
    Dwyer Instruments
  • SGP - Stainless Steel Schaeffer Gage The Series SGP Gages have dual English/metric scales with ±1.6% full scale accuracy. The Series SGP gages are designed with 304 SS housings, a 316L SS chamber and a 316 SS diaphragm for excellent chemical compatibility.
    Dwyer Instruments
  • DL6 - Data Logger Monitor and troubleshoot HVAC systems, verify energy management systems, or track performance of pneumatically controlled valves with Series DL6 Pressure/Temperature/RH Data Logger.
    Dwyer Instruments
  • A3000 - Photohelic Pressure Switch Gage 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
    Dwyer Instruments
  • PPM - Pulse Panel Meter The Series PPM has a unique, rugged, NEMA 4X front panel design that makes it nearly impenetrable in typical applications. The weatherproof, UV resistant, large, dual line display allows for more information, making it easier to read and simpler to program. The intensity of the display can be adjusted allowing this meter to be utilized in dark rooms as well as outdoors, due to its sunlight readable display.
    Dwyer Instruments

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