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Pyranometers

A pyranometer (from Greekπῦρ (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/m) 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.

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