The CMP 21 is a high performance research grade pyranometer, and has full compliance with all ISO 9060:1990 secondary standard Instrument performance criteria (highest possible ISO pyranometer performance category).
The CMP 21 pyranometer is developed for measuring irradiance (radiant flux, Watt/m²) on a plane surface as a result of the direct solar radiation and from the diffuse radiation incident received from the hemisphere above. The detector of the CMP11 and the CMP 21 range is the same and has an individually optimized temperature compensation. The housing temperature is monitored with a standard thermistor sensor. Each instrument is supplied with its own temperature and directional (cosine response) test data.
The key features of the CMP 21 are:
- A waterproof socket is fitted for the signature yellow signal cable, which is available in a range of lengths pre-wired to the waterproof plug.
- The integral bubble level is raised to the top of the housing and can be viewed without removing the redesigned snap-on sun shield, which also covers the connector.
- The screw-in drying cartridge is easy to remove and the replacement desiccant is supplied in convenient refill packets.
- The Pyranometer does not require any power, it supplies a low voltage of 0-20mV in relation to the amount of incoming radiation.
- When a higher voltage level or a 4-20mA signal is required, the AMPBOX is the perfect solution.