• Murphy

20P / 25P Series Pressure Swichgage®

The 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, pressure-indicating gages with built-in electrical switches. These switches exceed SAE standards and are used for tripping alarms and/or shut-down devices.

The Swichgage® was 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, air pressure, etc.

20P-50

20P7-100

25P-100

  • CE (European Conformity) mark
Base Models Specifications Downloads How to Order
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Specifications Drawer: 
  • Dial: White on black, dual USA/UK standard scale (U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar) [Other scales available; see How to Order]
  • Case: 20 and 25 series: plated steel
  • Bezel: Polished stainless steel, standard; others available
  • Lens: Polycarbonate, high-impact
  • Pointer: Tempered nickel silver
  • Oil: Silicon oil
  • Ambient Temperature Range: -40°F (-40°C) thru 150°F (66°C)
  • Process Connection: 1/8-27 NPTM brass.
  • Sensing Element: Beryllium copper diaphragm.
  • Gage Accuracy: See bulletin in downloads
  • Maximum Pressure: See bulletin​​​ in downloads
  • 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)
  • Snap-Switch Rating (20PE/25PE models): SPDT, 3 A @ 30 VDC inductive; 4 A @ 125 VAC inductive
  • Snap-Switch Wire Leads (20PE/25PE models): 20 AWG (0.75 mm2) x 12 in. (305 mm)  
  • Unit Weight and Dimensions: See bulletin​​​ in downloads

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to www.P65Warnings.ca.gov or visit our California Proposition 65 page.

Literature Drawer: 

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

All configurations may not be available. Call your sales representative or Enovation Controls for more information.

20P and 25P Series Swichgage
The gage pointer makes with an adjustable contact to complete a pilot-duty circuit.

20PE and 25PE Swichgage 20PE (was 20EO) and 25PE (was 25EO)
Features internal snap-acting SPDT switches, instead of the single pole/pointer contacts. When the switch closes on falling pressure, it becomes set, as pressure rises the switch resets.

20PABS and 25PABS Swichgage
Same as 20P and 25P with internal SPDT snap-switch for prealarm.

20P7 and 25P7 Lockout Swichgage
Same as 20P and 25P Series. They also include a front, semi-automatic lockout for startup override. This built-in device holds the pointer away from the contact on startup. When pressure exceeds the set point, the lockout is automatically disengaged (see bulletin in downloads for details).

20PG and 25PG MurphyGage
Gage without contact(s)