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thermopile, <for optical radiation>
thermal detector of optical radiation in which the electromotive force produced in several thermoelectric junctions is used to measure the heating effect produced by the absorbed radiation
Note 1 to entry: This entry was numbered 845-05-47 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-1311 in CIE S 017:2011.