SR22 is a solar radiation sensor of the highest category in the ISO 9060 classification system: secondary standard. On top of the features and benefits of the successful SR20 pyranometer, SR22 has domes made of high-quality quartz, resulting in an extended spectral range. Covering the full solar spectrum, SR22’s extended spectral range potentially offers lower measurement- and calibration uncertainties compared to pyranometers with glass domes. SR22 is typically used in high-accuracy climatological networks.
- SR22’s spectral range of 190 to 4000 x 10-9 m. SR22 covers the full solar spectrum
- SR22’s low temperature dependence makes it an ideal candidate for use under very cold and very hot conditions
- SR22 pyranometer uses a state of the art thermopile sensor with black coated surface
Extended Spectral Range
In order to improve overall measurement accuracy, Hukseflux effectively targeted two major sources of measurement uncertainty: calibration and “zero offset a”. The initial calibration uncertainty is less than 1.7 %. The “zero offset a” specification of SR22 is 5 W/m2 unventilated. Ventilated (with VU01) it is just 2.5 W/m2.
