HUMICAP Humidity and Temperature Transmitters HMT120 and HMT130


Vaisala HUMICAP Humidity and Temperature Transmitters HMT120 and HMT130 are designed for humidity and temperature monitoring in cleanrooms and are also suitable for demanding HVAC and light industrial applications.

 HMT120 and HMT130


  • Accurate and reliable measurement with Vaisala HUMICAP humidity sensor technology
  • Interchangeable probe (easy field calibration)
  • Resistant to dust and most chemicals
  • Enclosure IP65
  • 3-point traceablecalibration (certificate included)
  • Suitable for cleanrooms and demanding HVAC and light industrial applications

Vaisala HUMICAP Humidity and Temperature Transmitters HMT120 and HMT130 are designed for humidity and temperature monitoring in cleanrooms and are also suitable for demanding HVAC and light industrial applications.


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  • Humidity parameter options: relative humidity,dew point/frost point, wet bulb temperature, enthalpy, absolute humidity, mixing ratio, vapor pressure, and saturation vapor pressure
  • 2-wireloop-poweredor 3-wire voltage output configurations
  • OptionalLCDdisplay
  • USB cable available for a PC connection for maintenance
  • Wall-mountedorwith a remote probe
  • Constant output probe available
  • Can be mounted outdoors using a Vaisala installation kit and the Vaisala Radiation Shield DTR504A



The HMT120 and HMT130 transmitters incorporate Vaisala HUMICAP sensor technology that measures relative humidity accurately and reliably. Vaisala HUMICAP sensors are resistant to dust and most chemicals.

The HMT120 and HMT130 transmitter enclosure is optimized for use in cleanrooms. The smooth surface of the enclosure makes it easy to clean and the enclosure material is chosen to tolerate purifying agents. Furthermore, cabling can be done through the back wall of the transmitter.


Interchangeable Probe

The HMT120 and HMT130 transmitters use a fully interchangeable relative humidity probe. The probe can be easily removed and replaced with a new one

without having to adjust the transmitter, which allows for easy and quick recalibration of the transmitter. The probe can be adjusted using one of Vaisala handheld meters as a reference.

Also available is a constant output probe with fixed RH and T output for convenient inspection of the monitoring system and signal transfer line.


Available Options

The HMT120 and HMT130 transmitters are available as wall mounted or with a remote probe. For high temperature applications or where space is limited, the remote probe is ideal. The optional LCD display shows the measurement results of selected parameters in selected units. The parameters are displayed simultaneously at two separate rows on the display.