The CMP21 pyranometer is designed to measure the irradiance (measured in W/m²) on a plane surface, which results from the direct solar radiation and the diffuse radiation incident from the hemisphere above.
The CMP21 has the same detector as the CMP10 and individually optimized temperature compensation. 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.
