Switches

Switches
Sensors for air and non-combustible compatible gases have an electrical contact output at a specific difference between two pressures. Applications vary between the different types of differential pressure switches. A wide variety of switches and circuit styles enables control functions needed for any system.
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  1. Series 1800 Low Differential Pressure Switch for General Industrial Service
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    Compact Low Differential Pressure Switches ...
    Starting at $94.50
  2. Series 1900 Compact Low Differential Pressure Switches
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    Compact Low Differential Pressure Switches ...
    Starting at $66.50
  3. Series 1950 Explosion-proof Differential Pressure Switch
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    Explosion-proof Differential Pressure Switch applies to HVAC, proces ...
    Starting at $311.00
  4. SERIES 1950G EXPLOSION-PROOF DIFFERENTIAL PRESSURE SWITCH
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    Explosion-proof Differential Pressure Switch combines the best featu ...
    Starting at $448.00
  5. Series 1620 Single and Dual Pressure Switch
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    Single and Dual Pressure Switch which applies to damper positioning ...
    Starting at $428.00
  6. Series 1630 Large Diaphragm Pressure Switches
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    Large Diaphragm Differential Pressure Switches are used with air or ...
    Starting at $474.00
  7. SERIES 1640 FLOATING CONTACT NULL SWITCH FOR HIGH AND LOW ACTUATION
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    Floating Contact Null Switch for High and Low Actuation which applie ...
    Starting at $714.00
  8. Series DP Double Bellows Differential Pressure Switch
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    Double Bellows Differential Pressure Switch applies to accurate swit ...
    Starting at $1,483.00
  9. Series PG Gas Pressure/Differential Pressure Switch
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    Gas Pressure/Differential Pressure Switch is used with air and other ...
    Starting at $790.00
  10. Series 1996 Gas Pressure Switch
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    Gas Pressure Switch used with natural, manufactured, or LP gas. Appl ...
    Starting at $146.00
  11. Series MDS Miniature Pressure Switch
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    Miniature Pressure Switch applies to air proving, ventilation flow, ...
    Starting at $36.00
  12. Series MDA Miniature Adjustable Pressure Switch
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    Miniature Adjustable Pressure Switch applies to industrial, HVAC, me ...
    Starting at $31.50
  13. Series A4 Differential Pressure Switch
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    Differential Pressure Switch which is capable of carrying moderate s ...
    Starting at $212.00
  14. Series ADPS/EDPS Differential Pressure Switch
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    ...
    Starting at $24.25
  15. Series 1831 DPDT Low Differential Pressure Switches
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    DPDT Low Differential Pressure Switches which applies to HVAC and hi ...
    Starting at $172.00
  16. Series BDPA Adjustable Differential Pressure Alarm
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    ...
    Starting at $122.00
  17. Series DX Wet/Wet Differential Pressure Switch
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    Wet/Wet Differential Pressure Switch for use with most gases and wat ...
    Starting at $100.00
  18. Series EWDP Wireless Communications Adjustable Differential Pressure Switch
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    Wireless Communications Adjustable Differential Pressure Switch used ...
    Starting at $213.00
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Questions

Question
How can a standard 1910 pressure switch be used to sense pressure in an oven operating at 200 degrees Celsius?
Answer
Use metal tubing for sensing lines long enough to safely dissipate the heat.
Question
For which pressure switch applications are gold contacts recommended?
Answer
For "dry circuit" applications where little or no current is flowing in the circuit to help burn off contact dirt and oxidation. Switches used with solid state circuits often fall in this category.
Question
Will a Dwyer pressure switch be damaged if the pressure exceeding the maximum set-point is applied to the switch?
Answer
No. Not unless the maximum pressure rating of the switch is exceeded.
Question
Does Dwyer offer a fully UL/FM/CSA approved explosion proof pressure switch?
Answer
Yes. The 1950 and 1950G Series.
Question
EDPS series, can the 'delta-P' screw be used to increase or decrease deadband?
Answer
The ∆P screw should never be adjusted. It is used to calibrate the instrument to make sure it will switch within the specified range.