Radiometers
A Net Radiometer is a device that measures the difference between incoming and outgoing radiation from a surface, also known as net radiation. It is useful for measuring direct incoming shortwave radiation, reflected shortwave radiation, diffused long wave (infra-red) radiation against outgoing long-wave infrared radiation and surface-reflected short-wave radiation.
These types of devices are used in scientific-grade energy balance and surface flux studies. They offer 4 distinct 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 easily derived.
A typical radiometer is composed of a thermopile sensor with upper and lower surfaces forming the outer sensing surfaces of the radiometer. The surface that absorbs the most radiation gets heated up rapidly, and its temperature will be greater than that of the opposing surface. As a result, a temperature difference is created between the two sides of the sensor. This difference in temperature is then converted into a voltage.
Net radiometers are commonly used in meteorological stations, solar energy studies, avalanche forecasting, multidisciplinary studies and more.
Product Line
RA01
Manufacturer: Hukseflux
RA01 is a market leading 2-component radiometer, used in scientific-grade energy balance and surface flux studies. It offers 2 separate measurements of solar and longwave radiation. Product features include a modular design, low weight, and easy levelling, and low solar offsets in the longwave measurement.
Specifications:
- Measurand: downward longwave radiation, global solar radiation
- Optional measurand: sky temperature, solar duration
- Included sensors: 1 x ISO 9060 spectrally flat Class C pyranometer, 1 x pyrgeometer with 150° field of view angle
- Spectral range solar: 285 to 3000 x 10⁻⁹ m
- Spectral range longwave: 4.5 to 42 x 10⁻⁶ m
- Required readout: 2 x DC voltage 1x Pt100
- Rated operating temperature range: -40 to +80 °C
- Temperature sensor: Pt100
NR01
Manufacturer: Hukseflux
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.
Specifications:
- 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
- Included sensors: 2 x identical ISO 9060 spectrally flat Class C pyranometers 2 x identical pyrgeometers with 150° field of view angle
- Spectral range solar: 285 to 3000 x 10⁻⁹ m
- Calibration uncertainty solar: < 2.4 %
- Spectral range longwave: 4.5 to 42 x 10⁻⁶ m
- Calibration uncertainty longwave: < 7 %
- Temperature sensor: Pt100