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The radiometer UV sensors serve as measuring heads fort he measurement of UV irradiances with the radiometers
RM12 and RM21 as well as with the dose controller UV-MAT.
The integrated diffuser serves for the cosinus correction that is necessary at non-perpendicular irradiation.
The sensors are calibrated with respect to a PTB (Physikalisch-Technische Bundesanstalt) reference.
The VIS sensors measure irradiances for blue (VISB) or blue-green (VISBG) light respectively illuminances
according to the day sensitivity curve of the eye V(lambda) (VISL).
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