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Murphy Pressure Swichgage w/ Light Pipe Illumination 20P-IP1-75

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Murphy 0-75 PSI Mechanical Pressure Swichgage w/ Light Pipe Illumination - 20P-IP1-75

Product Condition: NEW
Murphy Mechanical Pressure Swichgage 0-75 PSI with Light Pipe Illumination 20P-IP1-75
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The Murphy 0-75 PSI Mechanical Pressure Swichgage with Light Pipe Illumination 20P-IP1-75 is a diaphragm-actuated, pressure-indicating gage with a built-in electrical switch. This swichgage is used for tripping alarms and/or shutdown devices. The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning.

The gage pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the Swichgage case and have self-cleaning motion to ensure electrical continuity. The gage pointer makes with an adjustable contact to complete a pilot-duty circuit. Specifically designed to protect engines/equipment in Oil Field, Marine, Irrigation, Construction and Trucking applications to monitor engine lube pressure, water pump pressure, hydraulic pressure and air pressure.



  • Combination Indicating Gage and Limit Switch
  • Switch Can Activate Alarms and/or Shutdown Equipment
  • Exceeds SAE Standards
  • Light pipe illumination


  • Part No.: 20P-IP1-75
  • Range: 0-75 psi (517 kPa) [5.0 bar]
  • IP1: Light pipe illumination, 12 VDC
  • 2 inch/51 mm dial
  • Dual scale; U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar
  • Case: Plated steel; mounting clamp included (except for direct mount models)
  • Bezel:Polished stainless steel
  • Lens:Polycarbonate, high-impact
  • Oil:Silicon Oil
  • Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C); Process: -40°F (-40°C) thru 250°F (121°C)
  • Process Connection: 1/8-27 NPTM brass
  • Sensing Element: Beryllium copper diaphragm
  • Adjustable Limit Contact: SPST contact; pilot- duty only, 2 A @ 30 VAC/DC; Normally Close (NC) when the low limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver
  • Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale
  • Limit Contact Wire Leads: 18 AWG (1.0 mm2) x 12 in. (305 mm)
  • Unit Weight: 8 oz. (0.23 kg)
  • Unit Dimensions: x 3 x 3 in. (76 x 76 x 76 mm)


Additional Information

Product Condition NEW
upc No

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