Net radiometers

Radiometers are used in scientific-grade energy balance and surface flux studies. NR01 is a market leading 4-component net radiometer. 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. From these 4 separate components the net radiation is derived. RA01 is a 2-component radiometer, offering two separate measurements of solar and longwave radiation. Both products feature a modular design, low weight, and easy levelling, and low solar offsets in the longwave measurement. The unique capability to heat the pyrgeometer reduces measurement errors caused by dew deposition. 

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4-component net radiometer
Measurand downward longwave radiation*, global solar radiation, net radiation, reflected solar radiation, upward longwave radiation*
Optional measurand albedo or solar reflectance, sky temperature*, solar duration, surface temperature*

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2-component radiometer
Measurand downward longwave radiation*, global solar radiation
Optional measurand sky temperature*, solar duration

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