• Murphy

45APE Series

The 45APE Series Swichgage instrument is a mechanical gage for pressure indication.

It includes two adjustable SPDT switches. These snap-acting switches can be used for start and stop, to trip alarms and to shut down equipment. Ranges are available from 30” VAC (-100 kPa) [-1 bar] thru 10,000 psi (138 MPa) [1379 bar]. The 45APE Series utilizes a bourdon tube sensing unit with a stainless steel dual-sector geared movement. Each of the sectors drives 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. As pressure decreases or increases through the principal of lost motion, the respective snap-switch is tripped.

  • CSA mark (for Canada)
Specifications Downloads Models
X
Specifications Drawer: 
  • Dial: White on black, dual scale, psi and kPa standard, 4-1/2 in. (114 mm) diameter
  • Case: Die cast aluminum, surface or panel mount
  • Overrange: Do not exceed 10% FS above full range
  • Process Connection: 1/4 NPTM thru 1000 psi; 1/2 NPTM 1500 - 10,000 psi; back connection optional
  • Sensing Element: Bronze or 316 stainless steel bourdon tube
  • 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%. Indicating pointer above or below trip point:
Range Accuracy (+/-) above & below to trip point only
< 100 (except 15 psi)10
1515
100-3004
400-15002
200012
3000-50008

Reading based on testing performed with switch point at mid scale which represents worst case. Switch accuracy ±1.5%.

  • Pressure Relief Disc: Back of case (except EX models)
  • Switch Reset Deadband: Approximately 10% FS
  • Snap-Acting Switches: 2-SPDT; 2 A @ 250 VAC
  • Dry Relay Contact (BP Models): 10 A @ 28 VDC or 10 A @ 120 VAC
  • Wire Connections (Surface Mount): 1/2 NPTF conduit/ terminal block
  • Wire Connections (Panel Mount): Wire leads, 18 AWG (1.0 mm2) x 9 in. (229 mm) long
  • Wire Connections (-ES, -OS): 1/2 NPTM conduit and wire leads, 24 AWG (0.22 mm2) x 30 in. (762 mm) long
  • Weight: 5 lbs 6 oz (2.4 kg) approximately
  • Explosion-proof models: 21 lb. (9.5 kg) approx.
  • Dimensions: 10 x 9 x 6 in. (254 x 229 x 152 mm) approximately
  • Explosion-proof models: 12 x 12 x 9 in (305 x 305 x 229 mm) approximately
  • CSA Certified Models: 45APE Series models with pressure range thru 5000 psig (34.4 MPa) [344 bar] are CSA approved for non-hazardous locations, except options BC, ES, LC and OS. Explosion-proof EX models with pressure range thru 5000 psig (34.4 MPa) [344 bar] are CSA approved for Hazardous locations
    Class I, Groups, C & D. 45APEBP and 45APEBPE models are not CSA certified.

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

45B Series Swichgage instrument
For use with 12-32 VDC battery ignition systems; it includes battery ignition type magnetic switch.   

45CD Series Swichgage instrument
For use with (CD) capacitor discharge ignitions; it includes CD ignition type magnetic switch.

45M Series Swichgage instrument
For use with magneto type ignitions; it includes magneto ignition type magnetic switch.

45N Series Swichgage instrument
For specific use with 110 VAC Power Sources; it includes 120 VAC type magnetic switch.