Spectral hygrometer, which is also called optical hygrometer determines the amount of precipitable moisture in a given region of the atmosphere by measuring the attenuation of radiant energy caused by the absorption bands of water vapor.
Ref: 124408/2006-10-28

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Hygrometer (Ein Hygrometer (Feuchtemesser) ist ein Instrument ...)

Alternative Spellings (Synonyms): Hygrometern
List of books: Spectral,hygrometer

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