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Murphy 0-400 PSI Explosion-Proof Swichgage Instrument 45APE-S-400-EX

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Murphy Explosion-Proof 0-400 PSI Surface Mount Swichgage Instrument - Square Case - 45APE-S-400-EX

Product Condition: NEW
Murphy Surface Mount Explosion-Proof Swichgage Instrument 0-400 PSI with Stainless Steel Bourdon Tube 45APE-S-400-EX

Availability: Out of stock


The Murphy Explosion-Proof 0-400 PSI Surface Mount Swichgage Instrument with Square Case 45APE-S-400-EX is a mechanical gage for pressure indication. It includes 2 adjustable SPDT switches. These snap-acting switches can be used for start and stop, to trip alarms and to shut down equipment. The 45APE Series utilizes a bourdon tube sensing unit with a stainless steel dual-sector geared movement. Each of the sectors drive separate pointers when pressure is applied to the bourdon tube. The indicating pointer (visible pointer) shows actual pressure reading, including below and beyond the low and high trip points. The low and high trip points are adjustable independently on the gage front lens.

The switch operator pointer (behind the dial) is calibrated to follow the indicating pointer. The low and high trip point indicators “arrest” the switch operator pointer, and as pressure decreases or increases, through “the principal of lost motion” the respective snap-switch is tripped. The 45APE Series models are widely used in applications requiring pressure indication and Form “C” low and high pressure switches.



  • Surface Mount Version (square case)
  • 4-1/2 in. (114 mm) Diameter
  • Combination Indicating Gage with Independent Low and High Snap-Acting Switches
  • Field-Adjustable and Highly Visible Low and High Pressure Trip Point Indicators
  • Dual-Sector Geared Movement Allows for Full-Scale Indication and Set Point Control
  • EX = Explosion-Proof (approved for hazardous areas Class I, Groups C & D to <=5000 psig)



  • Part No.: 45APE-S-400-EX
  • Range: 0 - 400 PSI (0-2.76 MPa) [0 - 27.57 bar]
  • Dial: White on black, dual scale, psi and kPa standard, 4-1/2 in. (114 mm) diameter
  • Case: Die cast aluminum, surface mount
  • Overrange: Do not exceed 10% FS above full range
  • Process Connection: 1/4 NPTM thru 1000 psi
  • Sensing Element: 316 stainless steel bourdon tube
  • Socket: 316 stainless steel
  • Gage Accuracy: Indicating pointer within switch points with hysteresis of <1%: ±2% for first and last quarters of scale; middle half of scale is ±1%
  • Switch Reset Deadband: Approximately 10% FS
  • Snap-Acting Switches: 2-SPDT; 2 A @ 250 VAC
  • Wire Connections (Surface Mount): 1/2 NPTF conduit/ terminal block
  • Item Weight: 21 lb. (9.5 kg) approximately
  • Item Dimensions: 12 x 12 x 9 in (305 x 305 x 229 mm) approximately

Additional Information

Product Condition NEW
upc No

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