Folder originally containing test pastiles measuring X-radiation; English and French instructions, comparison tints; all pastilles used. Sabouraud & Noire Radiometer X
Nimbus 4 Radiometer, optics housing plus electronics module (flight space), 1968-1970 Selective Chopping Radiometer, 1968-1970 1968-1970
Holzknecht chromoradiometer, for measuring radiotherapeutic doses, probably German manufacture, 1905-1930. Holzknecht chromoradiometer 1905
Meteosat radiometer development model, with stand, European, 1975-1977. Meteostat Radiometer Development Model, 1975-77 1975-1977