HMP9 | Relative Humidity and Temperature Probe

HMP9 | Relative Humidity and Temperature Probe


  • Miniature probe head with low thermal mass for superior response time
  • RH accuracy up to 0.8 %RH
  • Temperature accuracy up to 0.1 °C (0.18 °F)
  • Temperature measurement range −40 … +120 °C (−40 … +248 °F)
  • Sensor purge provides superior chemical resistance
  • Modbus RTU over RS-485
  • Compatible with Indigo transmitters and Insight PC software
  • Traceable calibration certificate: 6 points for humidity, 1 point for temperature
  • M10×1.5 cable gland included for mounting the probe head


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The Vaisala HUMICAP Humidity and Temperature Probe HMP9 is designed for easy installation in rapidly changing environments where a fast response time, measurement performance, and chemical tolerance are essential. The compact size enables installation even in tight spaces, with the probe head only 5 mm (0.2 in) in diameter. For duct and chamber installations, a duct installation kit is available for the probe.

The HMP9 complements the Indigo product family and is ideal for applications such as inlet monitoring in dryers, air handling units, data centers, and other humidity measurement applications with temperatures under 120 °C (248 °F) that don’t involve high pressure or long exposure to condensing conditions. The HMP9 is compatible with Indigo500 series transmitters and Insight PC Software.




Product Specification


Detailed Product features and Specification


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