A pyranometer (from Greek πῦρ (pyr) 'fire' and ἄνω (ano) 'above, sky') is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm. A pyranometer with natural output does not require any power to operate as its transducers generates an electrical signal proportional to the solar irradiance.
A pyranometer (from Greek πῦρ (pyr) 'fire' and ἄνω (ano) 'above, sky') is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm. A pyranometer with natural output does not require any power to operate as its transducers generates an electrical signal proportional to the solar irradiance.
Source: Wikipedia "Pyranometer" · CC BY-SA 4.0
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