We offers two types of solar radiation sensor: silicon-cell and thermopile pyranometers, both types are now ISO 9060:2018 Class C rated (previously known as second class). Silicon-cell solar radiation sensor model is excellent for applications that do not require high accuracy and with limited budget. It is with faster response time and more competitive price. But it has higher errors under cloudy conditions. Our new cost-effective thermopile pyranometers features a blackbody thermopile detector that provides a much broader and more uniform spectral response for better performance in all atmospheric conditions. Illuminance sensor is widely used for shortwave radiation measurement in agricultural, ecological, and hydrological weather, and optimizing photovoltaic systems.