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Dwyer Instruments: Series HHT, Hazardous Area Humidity/Temperature Transmitter

Intrinsically Safe or Explosion-Proof Models

The SERIES HHT Hazardous Area Humidity/Temperature Transmitter takes accurate measurements in the harshest of environments. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically safe version is offered with 4 to 20 mA output for humidity and temperature, and do require an intrinsically safe barrier to meet hazardous area approvals. It is important to develop a routine schedule for replacing the RH/temperature sensor (part number A-451). The sensor should be replaced annually or sooner depending on application conditions.

Series HHT Applications

  • Process monitoring
  • Offshore HVAC monitoring
  • Dust and grain handling