Temperature Sensors

Temperature was probably the first measured meteorological parameter. Nowadays it still is one of the most common sensors within an Automatic Weather Station (AWS), often combined to measure humidity as well. Temperature is taken by a resistive thermal device while humidity is measured using a humidity-sensitive condenser.

Observator offers a range of temperature sensors with several standard measurement ranges. For measurement of ‘air' temperature and humidity these sensors are installed in so called radiation screens, preventing the thermal effect of direct and indirect radiation.

OMC-406 Temperature / Humidity sensor

The air temperature and humidity probe OMC-406 provides accurate and precise measurements of both temperature and humidity in two 4...20 mA outputs. The temperature sensor within this probe is a Pt100 element while the principle of humidity measurement is based on a capacitive measuring device.


  • Combined temperature and humidity sensor
  • High accuracy
  • Linear output 4...20 mA
  • Measuring range -40 to +60 deg. C
  • Reproducibility < ± 0.1 deg. C.
  • Measuring system Pt100, 1/3

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