A new generation to assure revolutionary new standard and lowest measurements uncertainty. All pyranometers comply to the latest ISO9060:2018. MS-80 is a unique pyranometer compliant to the "Fast reponse" and "Spectrally flat" sub-category under ISO 9060:2018 Class A. The heater and ventilator are suggested, particularly in areas impacted by dew, frost, snow, and dust.