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45APE Series - Mechanical Industrial Pressure Gauges
45APE Series - Mechanical Industrial Pressure Gauges

Industrial Pressure Gauges

45APE Series - Mechanical Industrial Pressure Gauges

The 45APE Series gauge instrument is a mechanical gauge for pressure indication. It includes two adjustable SPDT switches.

Combination indicating gauge 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
Panel- and surface-mount versions available
Latching control relay versions available

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 gauge 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 principle 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.

Basic Models

45APE Series gauge instrument
Surface mount (square case) version

45APEF Series gauge instrument
Panel Mount (round Case) Version

45APE Series - Mechanical Industrial Pressure Gauges

The 45APE Series gauge instrument is a mechanical gauge for pressure indication. It includes two adjustable SPDT switches.

Combination indicating gauge 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
Panel- and surface-mount versions available
Latching control relay versions available

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 gauge 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 principle 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.

Basic Models

45APE Series gauge instrument
Surface mount (square case) version

45APEF Series gauge instrument
Panel Mount (round Case) Version

Specifications

  • 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 1,500 – 5,000 psi
  • 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:
45APE/45APEF Series Accuracy Outside Switch Points (accuracy above or below trip point)
PSI Range Accuracy
< 100 10
100-300 4
400-1500 2
2000 12
3000-5000 8

Reading based on testing performed with switch point at mid scale which represents worst case

  • Pressure Relief Disc: Back of case (except EX models)
  • Switch Reset Deadband: Approximately 10% FS
  • Switch Point Accuracy: ±1.5%
  • Snap-Acting Switches: 2-SPDT; 2 A @ 250 VAC
  • Wire Connections (Surface Mount): 1/2 NPTF conduit entry with terminal block
  • Wire Connections (Panel Mount): Wire leads, 18 AWG (1.0 mm2) x 9 in (229 mm) long
  • Weight: 5 lbs 6 oz (2.4 kg) approximately
  • Explosion-proof models: 21 lb. (9.5 kg) approximately
  • 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
    • 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

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