Extended Spectral Range

On top of the features and benefits of SR20 pyranometer, SR22 has an inner and outer dome made of high-quality quartz. This results in SR22’s spectral range of 190 to 4000 x 10-9 m. SR22 covers the full solar spectrum, including the part between 3000 to 4000 x 10-9 m, which is not measured by pyranometers with glass domes.

Measurement Accuracy

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.

SR22’s low temperature dependence makes it an ideal candidate for use under very cold and very hot conditions. The temperature dependence of every individual instrument is tested and supplied as a second degree polynomial. This information can be used for further reduction of temperature dependence during post-processing.

Suggested Use

Areas of Application