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Murphy 30 PSI Differential Pressure Swichgage 20DPE-30

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Murphy 0-30 PSI Mechanical Differential Pressure Swichgage 2 in. w/ Snap-Acting Switch - Plated Steel - 20DPE-30

Product Condition: NEW
Murphy 30 PSI Differential Pressure Gauge in Plated Steel 20DPE-30
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

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The Murphy 0-30 PSI Mechanical Differential Pressure Swichgage 2" with Internal Snap-Acting SPDT Switch 20DPE-30 is a diaphragm-actuated, differential pressure-indicating gage with a built-in electrical switch. This switch is used for tripping alarms and/or shutting down equipment. Gauge is intended to monitor and indicate oil, fuel or water filter restriction and can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system. The 20DPE-30 mechanism is enclosed in a steel case coated to resist corrosion and it features a polycarbonate, break-resistant lens and a polished, stainless steel bezel to help protect this rugged, built-to-last instrument.

Features an internal snap-acting SPDT switch, instead of the single pole/pointer contacts. When the switch closes on rising pressure, it becomes Set, as pressure falls the switch Resets.


  • 2 inch/51 mm Dial
  • Monitors Engine Oil and Fuel Filters
  • Actuates Alarm or Shutdown System When Filter Becomes Clogged
  • Combination Indicating Gage and Limit Switch
  • Actuates Filter Backwash
  • Signals Coolant Loss or Aeration On Engine Water Pump
  • Internal Snap-Acting SPDT Switch



  • Part No.: 20DPE-30
  • Range: 0-30 psi/0-207 kPa
  • Dial: White on black, dual scale psi/kPa
  • Case: Plated steel
  • Bezel: Polished stainless steel
  • Lens: Polycarbonate, high-impact
  • Process Connection: 1/8-27 NPTM brass
  • Sensing Element: Beryllium copper diaphragm
  • Gage Accuracy: ±3% maximum across scale
  • Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C);Process: -40°F (-40°C) thru 250°F (121°C)
  • Snap-Switch Rating: SPDT, 3 A @ 30 VDC inductive; 4 A @ 125 VAC inductive
  • Unit Weight: 9 oz. (0.25 kg)
  • Unit Dimensions: 3 x 2-3/4 x 2-3/4 in. (76 x 70 x 70 mm)

Additional Information

Product Condition NEW
upc No

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