Compact Humidity and Temperature Transmitter for Demanding Industrial Applications


Reliable Vaisala HUMICAP® Technology
The HMT310 incorporates the latest generation Vaisala HUMICAP® Sensor.
The Vaisala HUMICAP® Sensor is a capacitive thin-film polymer sensor.
It features high accuracy, excellent long-term stability and negligible hysteresis.
It is insensitive to dust, particulate dirt and most chemicals.

Several Outputs, One Connector
The HMT310 is powered up with 12 ... 35 VDC. It has two analog outputs and an RS-232 serial output.
The output signal and the supply power travel in the same cable, the only cable connected to the unit.

Chemical Purge
Chemical purge helps to maintain measurement accuracy between calibraton intervals and it involves heating the sensor to remove harmful chemicals.
The function can be initiated manually or programmed to occur at set intervals.

Optional Functions

  • The following optional functions are available:
  • several probes for various applications
  • calculated humidity quantities
  • different mounting kits
  • sensor protection options and probe cable lengths
  • warmed probe and sensor heating for high humidity conditions (HMT317)
  • chemical purge for applications risking an interference with chemicals in the measuring environment.



  • Next-generation Vaisala HUMICAP® Sensor for excellent accuracy and stability
  • Full 0 ... 100 %RH measurement, temperature range up to +180 °C (depending on model)
  • Small size, easy to integrate
  • Insensitive to dust and most chemicals
  • NIST traceable


Types Of Humidity Products - Fixed Installations/OEM Products

  • HMT330

  • HMT360

  • HMT310

  • HMDW80

  • HMT120/130

  • HMW90

  • HMDW110

  • HMS110

  • HMS80

  • HMP60

  • HMP110

  • HMM100

  • HMP3

  • HMP4

  • HMP5

  • HMP7

  • HMP8

  • HMP9

  • INDIGO 200

  • INDIGO 520

  • TMP1

  • HMM170

  • HMD60