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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  • MC6 - Multi-Cal Benchtop Calibrator Model MC6 Multi-Cal Benchtop Calibrator performs a wide variety of simple and complex pressure based measurement, test, and calibration operations. Modular sensor design allows user to select pressure measurement range for application flexibility
    Dwyer Instruments
  • Series SCC - Signal Conditioner The Series SCC Signal Conditioners provide maximum accuracy with minimal cost. Built-in microprocessor digitally scales, amplifies, linearizes and isolates thermocouple, RTD, current, voltage, frequency or potentiometer analog input signals. Units offer 16-bit input resolution with 0.05% full scale accuracy. Eliminate ground loops with 1500 VAC isolation. Two LEDs, one red and one green, located on the front face of the enclosure provide visual indication of operation. Additional features include short circuit, reverse power protection, digital calibration and cold junction compensation.
    Dwyer Instruments
  • 1000E - Diaphragm Operated Pressure Switch Extremely rugged construction provides excellent reliability in chemical, petroleum and industrial plants. Bellville spring movement permits mounting of control in any position and helps prevent contact chatter. new design also provides high overpressure protection. Available with standard weatherproof housing to meet NEMA-1 through 4X and NEMA-13, JIC.
    Dwyer Instruments
  • 1000W - Diaphragm Operated Pressure Switch Extremely rugged construction provides excellent reliability in chemical, petroleum and industrial plants. Bellville spring movement permits mounting of control in any position and helps prevent contact chatter. new design also provides high overpressure protection. Available with standard weatherproof housing to meet NEMA-1 through 4X and NEMA-13, JIC.
    Dwyer Instruments
  • 1213 - Gas Pressure Manometer Provide visual indication of pressure with the Series 1213 Gas Pressure Manometer. Designed for use with natural gas, the manometer can also be used to monitor any compatible gases up to 15 inches of water column
    Dwyer Instruments
  • 1221 - Flex-Tube U-Tube Manometer These inexpensive manometers measure positive, negative and differential pressures. Dwyer Flex-Tube U-Tube Manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of .375" O.D. flexible and shatter proof clear butyrate tubing.
    Dwyer Instruments
  • 1222 - Flex-Tube U-Tube Manometer These inexpensive manometers measure positive, negative and differential pressures. Dwyer Flex-Tube U-Tube Manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of .375" O.D. flexible and shatter proof clear butyrate tubing.
    Dwyer Instruments
  • 1223 - Flex-Tube U-Tube Manometer These inexpensive manometers measure positive, negative and differential pressures. Dwyer Flex-Tube U-Tube Manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of .375" O.D. flexible and shatter proof clear butyrate tubing.
    Dwyer Instruments
  • 1227 - Flex-Tube U-Tube Dual Range Inclined Manometer Use Series 1227 as a regular U-tube manometer to read high-range pressure on the right leg, or as an inclined manometer to read low-range pressure on the bottom leg. Simply incline manometer until fluid levels read zero. No spirit level required
    Dwyer Instruments
  • 1230 - 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
  • 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
  • 1430 - Microtector Portable Electronic Point Gage Fast, accurate pressure measurements at moderate cost. Combines modern, solid state integrated circuit electronics with the time proven point gage manometer. Delivers repeatable accuracy in measuring positive, negative or differential pressures to ±.00025" water column over a 0 to 2" w.c. range.
    Dwyer Instruments
  • 1620 - Single and Dual Differential Pressure Switch Our old faithful switch design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches.
    Dwyer Instruments
  • 1630 - Large Diaphragm Differential Pressure Switch Our highest precision conventional large diaphragm pressure switch provides maximum dependability. In addition, it incorporates a visible set point indicator for maximum convenience. UL and CSA listed, FM approved for general service, these switches are suitable for most applications in air conditioning and industrial service.
    Dwyer Instruments
  • 1640 - Floating Contact Null Switch The unique electric switch design in the 1640 is another Dwyer Instrument, Inc. innovation. The Dwyer Model 1640 Differential Pressure Switch resembles the Series 1630 switches. The Model 1640, however, is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch.
    Dwyer Instruments
  • 1900 - Low Differential Pressure Switch Our most popular series combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications
    Dwyer Instruments
  • 1950 - Explosion Proof Differential Pressure Switch Model 1950 Explosion-proof Differential Pressure Switch combines the best features of the popular Dwyer Series 1900 Pressure Switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed
    Dwyer Instruments
  • 1950G - Explosion-Proof Differential Pressure Switch The Model 1950G Explosion-Proof Switch combines the best features of the popular Dwyer Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, and are UL listed for use in Class I, Groups A, B, C, & D; Class II, Groups E, F, & G and Class III atmospheres, ATEX for EExd IIB & Hydrogen T6, and CSA & FM approved for Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G and Class III atmospheres
    Dwyer Instruments
  • 1996 - OEM Gas Pressure Switch Reliable and convenient, the 1996-5 and 1996-20 Gas Pressure Switches serve 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
    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
  • 2-5000 - Minihelic II Differential Pressure Gages Combining clean design, small size and low cost with enough accuracy for all but the most demanding applications our Minihelic II 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.
    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
  • 3000SGT - Photohelic Pressure Switch/Gage with Integral Transmitter The Series 3000SGT Photohelic Switch/Gage/Transmitter combines several critical control functions into a single, easy-to-install package. This versatile instrument starts with the universally accepted standard for reliable low air pressure measurement, the Dwyer Magnehelic Gage.
    Dwyer Instruments
  • 400 - Air Velocity Meter Measure both pressure and air velocity Read the red figures directly in feet per minute of velocity - from 400 to 10,000 fpm No conversion tables needed for air at standard conditions. Read the black figures in inches of water column air pressure - from 0 to 10" w.c.
    Dwyer Instruments

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