Net radiometer
![4-component net radiometer showing the instrument's main components: 2 pyranometers (with domes, one visible at right facing up and the second at right facing down obscured by the white radiation shield above it) and 2 pyrgeometers (flat windows, again one visible (facing up) and one obscured (facing down)). Dimensions: diameter of the pyranometer dome is 20 mm. Photo shows model NR01.](/Images/godic/202501/29/Hukseflux_netto_radiometer_nr01_photo4422.jpg")
![Cross section of a 4-component net radiometer showing the instrument's main components:
(1) SWin solar radiation sensor or pyranometer,
(2) LWin far infrared radiation sensor or pyrgeometer,
(3) radiation shield,
(4) leveling assembly for x and y axis, block plus bolts for x-axis adjustment
(5) leveling assembly for x and y axis, horizontal rod,
(6) connection body, containing Pt100 temperature sensor, heater and hole for users own temperature sensor (add cable gland M8),
(7) LWout far infrared radiation sensor or pyrgeometer,
(8) leveling assembly for x and y axis, bolts for y-axis adjustment,
(9) SWout solar radiation sensor or pyranometer.](/Images/godic/202501/29/Net_radiometer_nr01_hukseflux_cross_section4422.gif")
![Example of a domeless net radiometer. The sensor contains two black-surface sensors (second one not visible) and has a single output signal representing the total net radiation. This instrument is typically used for lower accuracy net radiation measurement.](/Images/godic/202501/29/Hukseflux_Net_radiometer4423.jpg")
A net radiometer is a type of actinometer used to measure net radiation (NR) at the Earth's surface for meteorological applications. The name net radiometer reflects the fact that it measures the difference between downward/incoming and upward/outgoing radiation from Earth. It is most commonly used in the field of ecophysiology.