CMP22 Pyranometer

Pyranometer for Scientific research requiring the highest level of measurement accuracy and reliability.

  • Negligible thermal gradient zero-offset 
  • Lowest zero-offset due to FIR radiation 
  • Broad spectral range 200 to 3600 nm 
  • Directional error < 5 W/m²


CMP22 has all the features of CMP21 but uses very high quality quartz domes for a wider spectral range, improved directional response, and reduced thermal offsets. Because of the high optical quality of these domes, the directional error is reduced below 5 W/m².

CMP22 has individually optimised temperature compensation and a standard thermistor sensor is fitted to monitor the housing temperature. Each instrument is supplied with its own temperature and directional (cosine response) test data.

The pyranometer does not require any power, as it supplies a low voltage of 0 to 20mV in relation to the amount of incoming radiation. When a higher voltage level or a 4 to 20mA signal is required, you can combine the pyranometer with an AMPBOX as an alternative.


Spectral range (50% points) 200 to 3600 nm
Sensitivity 7 to 14 µV/W/m²
Response time 5 s
Zero offset A < 3 W/m²
Zero offset B < 1 W/m²
Directional response (up to 80° with 1000 W/m² beam) < 5 W/m²
Temperature dependence of sensitivity (-20 ºC to +50 ºC) < 0.5 %
Operational temperature range -40 °C to +80 °C
Maximum solar irradiance 4000 W/m²
Field of view 180 °