DR02 is a research grade direct normal incidence (DNI) solar irradiance sensor, also known as pyrheliometer. It complies with ‘First Class’ classification, as per the latest ISO 9060 and WMO standards. A unique product feature is the fast response and the heated window. DR02 pyrheliometers are typically mounted on a (solar) tracker.

DR02 pyrheliometer has been developed for use in monitoring of systems in solar energy applications. Because of its fast response, it is ideally suited for PV applications, where it will match the response time of the panels more closely than other types of pyrheliometers. This means improved accuracy in monitoring situations.

DR02 also features a thermally isolated low power window heater in the foreoptic. When cycled on/off prior to sunrise the heater effectively eliminates the formation of dew on the pyrheliometer window. This results in improved post sunrise measurement accuracy, as well as lower maintenance, as it requires less cleaning. Determining direct solar irradiance with DR02 requires connection to a data acquisition device and a two-axis solar tracker platform. Each DR02 pyrheliometer is calibrated upon manufacture and delivered standard with a WRR (World Radiometric Reference) traceable certificate of calibration.