Net radiometer NR01

solar

NR01 is a market leading 4-component net radiometer, mostly used in scientific-grade energy balance and surface flux studies. It offers 4 separate measurements of global and reflected solar and downwelling and upwelling longwave radiation, using 2 sensors facing up and 2 facing down. NR01 owes its popularity to its excellent price/performance ratio and major improvements relative to comparable instruments. Advantages include its modular design with 2 pairs of identical sensors, low weight, ease of levelling, and low solar offsets in the longwave measurement. The unique capability to heat the pyrgeometers reduces measurement errors caused by dew deposition. For accurate measurements NR01 measures the 4 separate components of the surface radiation balance: global solar radiation (downward), reflected solar radiation (upward), and downwelling and upwelling longwave radiation. The solar radiation sensors are called pyranometers and the longwave sensors are referred to as pyrgeometers. From these 4 separate components, the net radiation is derived. To calculate sky and surface temperatures, it is necessary to compensate for irradiated heat emitted by the pyrgeometers themselves (Stefan-Boltzmann law). A Pt100 temperature sensor is included in NR01’s body for this purpose. Sunshine duration may also be estimated using the WMO-approved pyranometric method. Atop the roof of the world The image below shows the NR01 net radiometer installed on a weather station near the summit of Mount Everest. The data will provide scientific insight into subjects ranging from melting glaciers to changing crop cycles. The best 4-component net radiometer on the market