A20PE-OS-100 Pressure Swichgage® (05704314)

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SKU: A20PE-OS-100 (05704314) *RATIONALIZED*
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Current Stock: 1

A20PE-OS-100 Pressure Swichgage (05704314)

Swichgage® instruments are built in the USA and have protected engines and equipment in applications such as oil and gas, marine, irrigation, construction and trucking applications to monitor engine coolant, crankcase oil, transmission oil and others for more than 80 years.

The A20PE Swichgage is CSA listed for non-hazardous areas, and it features internal snap-acting SPDT switches, instead of the single pole/pointer contacts, for three wire control and can be wired to make or to break a circuit. When the switch closes on falling pressure, it becomes set, as pressure rises the switch resets.



  • Dial: White on black, dual USA/UK standard scale (U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar)
  • Case: Polycarbonate/glass filled, corrosion-resistant; steel mounting clamp included
  • 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.
  • Adjustable Limit Contact (A20P and A25P): SPST contact; pilot-duty only, 2A@30 VAC/DC; Closed when the low limit is met. Open when pointer is in normal operating range. Contacts are gold flashed silver.
  • Limit Contact Adjustment: by a 1/16 in. hex wrench through 100% of the scale.
  • Wiring: Number 4 screw terminals; 
  • Snap-Switch Rating SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive
  • Wiring: Number 4 screw terminals
  • Unit Weight: 8 oz. (0.23 kg); 
  • Unit Dimensions: 8 oz. (0.23 kg)



  1. Sales Bulletin
  2. Installation Instructions

MurCal is an Authorized Distributor of Murphy by Enovation products.
MurCal provides experienced application and product support, before and after the sale.

For California customers: Prop 65 WARNING: This product may have been manufactured with or uses components that can expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov

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