The Radiometer has been compared with the Eppley scale of reference standards. The derived value of the constant for these instrumentsv is 8.37 Milivolt/cal cv min-1 (int) DataInventory Number: AST64Date: 1970 (c.)Maker: EppleyInstrument Categories: Meteorology PlacesLocation: Εθνικό Αστεροσκοπείο Αθηνών - National Observatory of Athens Origin: Εθνικό Αστεροσκοπείο Αθηνών - National Observatory of Athens