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Wet/Wet Differential Low Pressure Transmitters

0 to 25 inH2O, Differential Pressure


Item# PX154-025DI

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $383.30
5-9 $364.14
10-24 $356.47
25-49 $341.14
50-99 $333.47
100+ $325.81

In stock

Lead Time ( If not in Stock): 4 weeks

0 to 25 inH2O, Differential Pressure PX154-025DI PX154-025DI
  • For Industrial Applications Requiring Wet/Wet Differential Pressure
  • Zero and Span Adjustments for Field Calibration
  • Weatherproof NEMA-4 enclosure
  • Bidirectional Ranges Available
  • Liquids Can Be Applied to Both Ports

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Pressure Range Unit
Pressure Range Min
Pressure Range Max
Pressure Range
Pressure Type
Accuracy Class
Accuracy Value (compensated range)
Output Signal
Electrical Output
Pressure Port Size
Pressure Port Type
Operating Temperature Range

Product Specs

  • Accuracy Value ±0.75% BFSL
  • Maximum Compensation Temperature 0°C (32°F)
  • Minimum Compensation Temperature 0°C (32°F)
  • Pressure Burst Pressure 60 psi
  • Wetted Materials Wet Diaphragm
  • Excitation PX154: 24 Vdc (18 to 30 Vdc);PX157: 24 V (2 wire) DC unregulated
  • Zero Balance PX154 ONLY: 1%
  • Accuracy PX154: ±0.75% BFSL;PX157: ±0.75% FS PX157: ±0.75% FS
  • Burst Pressure PX154: 3x FS PX157: 60 psi
  • Compensated Temperature PX154: 0 to 50°C (32 to 122°F);PX157: '-30 to 80°C ('-22 to 176°F) PX157: '-30 to 80°C ('-22 to 176°F)
  • Weight  454 g (1.0 lb)
  • Dimensions 141 x 75 x 100 mm (5 9/16 x 2 15/16 x 3 15/16')
  • Proof Pressure PX154: 20 psi;PX157: 2x FS
  • Enclosure Epoxy coated, steel enclosure, NEMA 4 (IP65) rating
  • Media Compatibility PX154: Liquids or gases compatible with brass
  • Output 4 to 20 mA 
  • Termination Screw terminal block
  • Thermal Effects (PX154) Zero: ±0.03% FS/°C (±0.05% FS/°F) Span: ±0.03% rdg/°C (±0.05% rdg/°F); (PX157) Zero: ±0.02%/°C Span: ±0.02%/°C
  • Common Line Pressure PX154 ONLY: 20 psi
  • Humidity Effects PX157 ONLY: 5 to 99% RH (non-condensing)
  • Pressure Port 1/8 FNPT
  • Response Time 100 ms
  • Zero and Span Adjustment ±10%

The PX154 series are well suited to HVAC and pneumatic systems with a weatherproof, NEMA 4 enclosure. Available with a 4-20 mA output in ranges from -15 inH2O to 1,000 psi for the PX157 and from 0 -1 inH2O to 0-25 inH2O for the PX154.

The OMEGA PX154 transmitter provides an accurate, reliable, and economical means for monitoring differential pressures in HVAC automation, pneumatic systems, and process control. The output can be easily interfaced with chart recorders, data loggers, and computerized monitoring and control systems. Modern, pressure chemical vapor deposition methods provide simple, stable molecular bonds between a proven metal diaphragm and a polysilicone strain gage bridge. The integral metal diaphragm and polysilicone bridge are virtually unaffected by shock, vibration, or mounting.

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