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Low Differential Pressure Transmitter AI179
Pressure Medium: Air/Gas
Sensor Type: Differential
Supply Voltage: 5V
Output Signal: 4-20 mA
Pressure Range: Under 4” H2O
Kind: Packaged Transducer

Model 179 Series are low-range differential pressure transmitters. Each unit features a push-activated pressure equalization button, two Zero push button switches, a LCD and two LED lamps. 

With our unique push-activated pressure equalization button, the zero calibration can be performed without disconnecting the pressure tubes. It significantly reduces time and cost for users.

The AI179 has a stainless steel front panel and a stainless steel back enclosure. The pressure ranges from 20 Pa to 20Kpa, unidirectional or bidirectional. The output is 2-wire 4-20 mA, fully protected against short circuiting and incorrect wiring. All units are temperature-compensated with available accuracies of 0.8%, 0.4% and 0.25% FS. The patented stainless steel diaphragm sensor provides good corrosion resistance, excellent repeatability and long term stability.


  • 3 1/2 digit LDC display
  • Up to 15 PSI overpressure
  • Incorrect wiring protection
  • SS304 flush mounting
  • RoHS Compliance
  • Pressure ranges as low as 10 Pa
  • Temperature-compensated
  • Uni-directonal or bi-directional

Typical Uses

  • HVAC air pressure and VAV pressure sensor
  • Cleanroom pressure and fume hood airflow control
  • Duct static pressure measurement
  • Draft control
  • Furnace airflow control
  • Isolation rooms