The pyranometers LP PYRA 10 and LP PYRA 13 measure the irradiance on a flat surface (Watt/m?). The radiation measured is the sum of direct solar irradiance and diffuse irradiance (global radiation). LP PYRA 13 is equipped with an adjustable shadow ring for the measurement of diffuse radiation only. LP PYRA 10 and LP PYRA 13 are pyranometers classified as “Secondary Standards” in accordance with ISO 9060 and according to the publication “Guide to Meteorological Instruments and Methods of Observation”, fifth edition (1983) of WMO

Pyranometers LP PYRA 02 and LP PYRA 03 are well suited for the measurement of incoming global solar radiation (0.3μm…3μm spectral range). LP PYRA 12 shadow ring is designed to shield the instrument sensor from direct radiation; by that, an exact measurement of the diffuse sky radiation is possible.