Characteristics Pyranometer is produced based thermopile principle; sensing elements are made by winding – plated thermopiles with multi contacts Its surface is coated by black coating with high absorption rate. Hot contacts on the sensors surface, while the cold junction is located within the body,temperature difference between the hot and cold junction generates electromotive force, the thermoelectric effect is proportional to the solar radiation. Technical Data : Spectral range : 300-3200nm Supply : 5V,12-24VDC Range : 0-2000W/m2 Output : 0-20mV,0-5V,4-20mA,RS485 Sensitivity : 7-14μV*W-1*m2 Internal resistance : 350Ω Zero drift( temperature drift:5k/h) : ±5W/m2 Instruction Manual