Dwyer

Dwyer

Dwyer Instruments is a leading manufacturer in the controls and instrumentation industry, with long-established brand names like Magnehelic® differential pressure gauges and Photohelic® pressure switch/gauges. Dwyer differential pressure gauges are exceptionally responsive, can operate in any position, and are resistant to shock and vibration. The Dwyer family also includes Mercoid Controls, Love Controls, W.E. Anderson and Proximity Controls. Lesman stocks several sizes and ranges of Dwyer's most popular gauges, and they can be ordered easily through our secure online store.

In 2022, Lesman earned the designation of Dwyer Preferred Distributor for Process Instrumentation in Illinois, Wisconsin, Washington, and Oregon. If the Dwyer product you need is not shown here on our website, please call 800-953-7626 for assistance.

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  1. Dwyer RHP Humidity/Temperature Transmitters. Clockwise from top left: Outside air with sintered filter, outside air with radiation shield, outside air, and duct mount models
    Dwyer RHP Humidity/Temperature Transmitter

    Prices Start At:

    $125.25
  2. Dwyer 1831 DPDT Low Differential Pressure Switch with Manual Reset - Front View
    Dwyer 1831 DPDT Low Differential Pressure Switch with Manual Reset

    Prices Start At:

    $172.00
  3. Dwyer 626 628 Industrial Pressure Transmitters Family
    Dwyer 626 and 628 Industrial Pressure Transmitters

    Prices Start At:

    $176.00
  4. Dwyer 1900 Low Differential Pressure Switches for OEM Applications
    Dwyer 1900 Low Differential Pressure Switches for OEM Applications

    Prices Start At:

    $66.50
  5. Dwyer MS Magnesense Differential Pressure Transmitter (Accuracy 1%-2% FS)
    Dwyer MS Magnesense Differential Pressure Transmitter (Accuracy 1%-2% FS)

    Prices Start At:

    $107.00
  6. Dwyer Series 605 Magnehelic Indicating dP Transmitter
    Dwyer 605 Magnehelic Differential Pressure Indicating Transmitter

    Prices Start At:

    $413.00
  7. Dwyer Mercoid DA Snap Action Bourdon Tube Pressure Switches
    Dwyer Mercoid DA Snap Action Bourdon Tube Pressure Switches

    Prices Start At:

    $787.00
  8. Dwyer Magnesense MSX Differential Pressure Transmitter  - Wall Mount with Display
    Dwyer Magnesense MSX Differential Pressure Transmitter (Accuracy 1% FS)

    Prices Start At:

    $104.00
  9. Dwyer TTE Explosion-Proof RTD Temperature Transmitter with LCD Display
    Dwyer TTE Explosion-Proof RTD Temperature Transmitter

    Prices Start At:

    $561.00
  10. Dwyer 1800 Low Differential Pressure Switch General Industrial Service
    Dwyer 1800 Low Differential Pressure Switch General Industrial Service

    Prices Start At:

    $94.50
  11. Dwyer Mark 1 Series Aluminum Valve Position Indicator
    Dwyer Mark Series Valve Position Indicator

    Prices Start At:

    $316.00
  12. Dwyer Mercoid 3100D Explosion-Proof Smart Differential Pressure Transmitter (Accuracy 0.075% FS): CE, FM, or ATEX Approved
    Dwyer Mercoid 3100D Explosion-Proof Smart Differential Pressure Transmitter (Accuracy 0.075% FS)

    Prices Start At:

    $1,350.00
  13. Dwyer Series 1950 Explosion-Proof Differential Pressure Switch
    Dwyer Series 1950 Explosion-Proof Differential Pressure Switch

    Prices Start At:

    $295.00
  14. Dwyer MP Mini Photohelic Differential Pressure Gauge
    Dwyer MP Mini-Photohelic® Differential Pressure Gauge

    Prices Start At:

    $437.00
  15. Dwyer HHT Hazardous Area Humidity-Temperature Transmitter with Optional Integral Display
    Dwyer HHT Hazardous Area Humidity-Temperature Transmitter

    Prices Start At:

    $1,137.00
  16. Dwyer F6-SS Vertical Float Level Switch
    Dwyer F6 and F7 Vertical Float Level Switches

    Prices Start At:

    $60.00
  17. Dwyer Series SFI-100 Midnight Sight Flow Indicator
    Dwyer SFI-100 and SFI-300 Midwest Sight Flow Indicators

    Prices Start At:

    $145.00
  18. Dwyer 475 Intrinsically Safe Handheld Digital Manometer
    Dwyer 475 Intrinsically Safe Handheld Digital Manometer

    Prices Start At:

    $189.00
  19. Dwyer GSTA Gas Transmitter with Universal Analog Output - Wall Mount
    Dwyer GSTA Gas Detection Transmitter with Universal Analog Output

    Prices Start At:

    $216.00
  20. Dwyer Series VF Visi-Float® Acrylic Flowmeter
    Dwyer VF Visi-Float® Acrylic Flowmeter

    Prices Start At:

    $35.50
  21. Dwyer L6 Flotect Liquid Level Float Switches
    Dwyer L6 Flotect Liquid Level Float Switches

    Prices Start At:

    $285.00
  22. Dwyer 616KD DIN-Rail Mountable Differential Pressure Transmitter
    Dwyer 616KD DIN-Rail Mountable Differential Pressure Transmitter

    Prices Start At:

    $87.50
  23. Dwyer Minihelic II 2-5000 Series Differential Pressure Gauge
    Dwyer Minihelic II 2-5000 Series Differential Pressure Gauge

    Prices Start At:

    $44.25
  24. Dwyer Photohelic A3000 Combination Differential Pressure Switch Gauge for Air or Gas
    Dwyer Photohelic A3000 Series Differential Pressure Switch-Gauge for Air or Gas

    Prices Start At:

    $340.00
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