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NEMA 4 Pressure Transmitter AI168
Pressure Medium: Air/Gas
Sensor Type: Differential
Supply Voltage: 5V
Output Signal: Voltage, 4-20 mA
Pressure Range: Under 4” H2O
Kind: Packaged Transducer

Model 168 Series are low range differential pressure transducers and transmitters with NEMA 4 (IP-65) rated aluminum enclosures. They are very rugged and reliable, good for many industrial applications. The pressure range covers from 0.1"WC to 100"WC, unidirectional or bi-directional.

The output can be 3-wire 0-5V, 0-10V or 2-wire with a 4-20 mA output, fully protected against short circuits and incorrect wiring. In the voltage version, the output can go down to true zero. The units can be temperature-compensated. The accuracy can be 0.8%, 0.4% or 0.25% at room temperature. The patented stainless steel sensor provides good corrosion resistance, excellent performance and long-term stability. Our unique production setup can also make special pressure ranges (e.g. -0.5"WC to +3.5"WC) to meet special applications. 


  • NEMA 4 enclosure
  • Up to 15 PSI overpressure
  • Incorrect wiring protection
  • Asymmetrical bidirectional pressure ranges available
  • Temperature-compensated
  • Uni-directional or bi-directional
  • True zero output for voltage unit
  • Meets CE conformance standards
  • Meets RoHS requirements
  • Pressure ranges at low as 10 Pa

Typical Uses

  • HVAC and VAV control
  • Cleanroom and fume hood control
  • Duct static pressure measurement
  • Draft control
  • Furnace airflow control
  • Power plant airflow monitoring and control