CMP3

The CMP3 pyranometer is an instrument for measuring solar irradiance. The thermopile sensor construction measures the solar energy that is received from the total solar spectrum and the whole hemisphere (180 degrees field of view). The output is expressed in Watts per meter square. The CMP3 pyranometer is designed for continuous indoor and outdoor use.

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CMP Series

Key features

  • Low cost radiometer for accurate routine measurements
  • Weatherproof cable connector
  • 5 year warranty (*)
  • Easy way of levelling the instrument

The CMP3 pyranometer (ISO Second Class) is intended for shortwave global solar radiation measurements in the spectral range from 310 to 2800 nm. The thermopile detector measures irradiance up to 2000 W/m² with response time <18 seconds and typical sensitivity 10 µV/W/m² that varies less than 5 % from -10 ºC to +40 ºC.

Operating temperature range is -40 ºC to +80 ºC and the stability is better than 1 % per year.

The CMP3 pyranometer features a snap-on white sun shield, integrated leveling and a weatherproof connector which is supplied pre-wired with 10 m of signal cable for simple installation. An optional mounting rod and longer cable lengths are available. Two CMP3s can easily be mounted back-to-back to make a low-cost albedometer.

(*) This product will need to be registered by the end-user within 6 months of purchase to activate the 5 year warranty.

Technical specification

Spectral range (50% points) 300 to 2800 nm
Sensitivity 5 to 20 µV/W/m²
Response time 18 s
Zero offset A < 15 W/m²
Zero offset B < 5 W/m²
Directional response (up to 80° with 1000 W/m² beam) < 20 W/m²
Temperature dependence of sensitivity (-10 ºC to +40 ºC) < 5 %
Operational temperature range -40 °C to +80 °C
Maximum solar irradiance 2000 W/m²
Field of view 180 °

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