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Important features :
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The CMP 3 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 square meter. The CMP 3 pyranometer is designed for continuous indoor or outdoor use.
The CMP 3 pyranometer (ISO 9060:2018 - spectrally flat, class C / formerly ISO 9060:1990 second class) 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 response time <18 seconds and typical sensitivity 10 µV/W/m².
The integrated bubble level is raised to the top of the housing and can be viewed without removing the snap-on sun shield, which also covers the signal cable connector. Two CMP 3s can easily be mounted back-to-back to obtain a low-cost albedometer.
The pyranometer does not require any power. His output signal is a low voltage around 0 - 20 mV in relation to the amount of incoming radiation. When a higher signal level (0 - 1 V or 4 - 20 mA) is required, the choice of an AMPBOX or the SMART PYRANOMETER Model SMP 3 has to be considered.
Specifications
| Spectral range (50% points) | 300 to 2800 nm |
| Sensitivity | 5 - 20 µV/W/m² |
| Response time | 18 s |
| Zero offset - thermal radiation (at 200 W/m²) |
< 15 W/m² |
| Zero offset - temperature change (5 K/h) |
< 5 W/m² |
| Directional response (up to 80° with 1000 W/m² beam) | < 20 W/m² |
| Temperature dependence of sensitivity (-10ºC to +40ºC) | < 5 % |
| Operational temperature range | -40...+80°C |
| Field of view | 180° |
| Maximum solar irradiance | 2000 W/m² |
| Overall accuracy | ± 10 % |
