CMP3 Pyranometer

  • ISO 9060 spectrally flat Class C
  • No change of desiccant for 10 years
  • Low cost radiometer for accurate routine measurements
  • Weatherproof cable connector
  • Easy way of leveling the instrument
  • Two CMP3s can form an albedometer
  • 5 year warranty

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CMP3 Pyranometer

The CMP3 pyranometer is an instrument for measuring the 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.

The CMP3 pyranometer (ISO 9060 spectrally flat Class C) is intended for shortwave global solar radiation measurements in the spectral range from 300 to 2800 nm. The thermopile detector measures irradiance up to 2000 W/m² with a response time of less than 20 seconds and a temperature response of less than 4% within the range of -10 ºC to +40 ºC.

Operating temperature range is -40 ºC to +80 ºC and the non-stability is less 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.

The Pyranometer does not require a dedicated power supply. It generates a low voltage output in the estimated range of 0 to 48 mV relative to an irradiance measurement range of 0 to 1500 W/m2. When a higher voltage output or a 4 to 20 mA signal is required, the AMPBOX is the perfect solution.

For instruction on the installation of the CMP3 pyranometer, please watch this video.




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Spectral range (50% points) 300 to 2800 nm
Sensitivity 24 to 32 µV/W/m²
Response time < 20 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) < ±4 %
Operational temperature range -40 °C to +80 °C
Maximum solar irradiance 2000 W/m²
Field of view 180 °



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