Vaisala HMP155 Humidity and Temperature Probe
Starting at $728.00

Usually ships in 1-2 weeks [?]

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  • HUMICAP 180R sensor - superior long-term stability
  • Optional warmed humidity probe and chemical purge
  • USB-connection cable for service use
  • Fits in DTR13, DTR502/503 radiation shields & Stevenson screen
  • Weather-proof IP66 housing
  • Optional fast temperature probe
  • Voltage, RS-485 & resistive PT100 outputs
  • Applications:
    • Meteorology
    • Aviation & road weather
    • Instrumentation

This product is an accessory for the following products:

Vaisala PTB330TS Barometeric Pressure Transfer Standard
Combines Vaisala PTB330 barometer and MI70 indicator to create a barometric pressure transfer standard

The Vaisala HMP155 humidity and temperature probe provides reliable humidity and temperature measurement. It is designed especially for demanding outdoor applications.

The HMP155 has the proven Vaisala HUMICAP 180R sensor that has excellent stability and withstands harsh environments. The probe structure is solid and the sensor is protected by default with a sintered teflon filter, which gives maximum protection against liquid water, dust, and dirt.

Measuring humidity reliably is challenging in environments where humidity is near saturation. Measurements may be corrupted by fog, mist, rain, and heavy dew. A wet probe may not give an accurate measurement in the ambient air. This is an environment to which Vaisala has designed a patented, warmed probe for reliable measuring. As the sensor head is warmed continuously, the humidity level inside it stays below the ambient level. Thus, it also reduces the risk of condensation forming on the probe.

With its fast response time, the additional temperature probe for the HMP155 is ideal for measurement in environments with changing temperatures. The new membrane filter speeds up the RH measurement.

The HMP155 can be calibrated using a PC with a USB cable, with the push buttons, or with the MI70 indicator.

Vaisala DTR503A Radiation Shield
12-plate shield to protect humidity and temperature sensors from solar radiation and precipitation