The PMA2140 global radiometer
measures irradiance within the range of 400 to 1100nm. It is especially
useful in cost-sensitive applications where the flat spectral response of thermopile based
instruments is not needed. The PMA2140 can be used to monitor the global solar irradiance (direct + diffuse). It is factory calibrated to accurately read the global solar irradiance (from 300 to 2800nm) if exposed to the standard sun, even though the detector is not sensitive beyond 1100nm. This is achieved by applying a correction factor during calibration (see the calibration section). The radiant power within the range of 400-1100nm constitutes about 75% of the total solar radiation for an overhead sun under clear sky.
High sensitivity permits measurements of weak sources but caution is advised when measuring artificial sources since the spectral distribution of the source’s irradiance will affect the reading. A correction factor can be calculated to take the spectral distribution into account.
The detector is equipped with a cosine diffuser that assures an angular response within 5% of the cosine function for incident angles less than 60 degrees. This diffuser makes it suitable for measurements of diffuse radiation and radiation from extended sources.
FEATURES
- Wide spectral range
- Excellent long term stability
- Cosine corrected
- NIST traceable calibration
- High sensitivity
- Low cost
APPLICATIONS
- Meteorology
- Agriculture
- Solar power research and testing
- Heating and air conditioning
- Lighting
- Physics and optical laboratories
