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ZRP31 Pressure Switch
Model：ZRP31

ZRP31 is capable of detecting pressures as low as 0.05 inches of water. Factory calibrated units maintain set point tolerance of +/- 10% over a temperature range of -40°F to 185°F due to its molded silicone diaphragm and stability of its glass filled polyester body. We offers multiple electrical terminations and mounting options as well as bleed holes and 3 different size orifices.


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  • Description

    • Media: Air, products of combustion or natural gas

    • Operating Pressure Range:0.15in/H2O to 34in/H2O

    • Mounting Position :Diaphragm in any vertical Plane

    • Proof Pressure:100in/H2O(3.6psi)

    • Burst Pressure:5psi minimum

    • Operating Temperature:-40°C to +85°C

    • Contact Arrangement:SPST or SPDT

    • Electrical Rating: 

    Resistance: initaial: < 50milliohms

    Current:100mA mimimum, 5A(restie)maximum(fine siver aly contacts);15mA minimum, 0.5A maximum(gold-platinum-silver alloy contacts)

    • Termimnals:6.3mm or 4.8mm copper alloy

    • Connection:φ6.4mm for tube connection

    • Conversion: 1 inch/H2O= 249Pa   1 mbar= 100Pa


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