Several new Kipp and Zonen sensors are now available for solar-energy research applications. A complete solar monitoring station for research or solar prospecting typically measures global horizontal radiation (GH), direct normal irradiance (DNI), and diffuse radiation. For monitoring GH, Campbell Scientific offers the CMP6, CMP11, and CMP21 pyranometers. These pyranometers measure solar radiation with a high-quality blackened thermopile protected by two glass domes. Based on differences in accuracy and performance, the CMP6 has an ISO classification of First Class, and the CMP11 and CMP21 have an ISO classification of Secondary Standard. The CMP21 also includes an internal thermistor allowing individually optimized temperature compensation of the measurements. The optional CVF3 Ventilation Unit is offered to keep the domes of any of these pyranometers free from ice, dust, and dew. www.campbellsci.com
