Twenty four electrical radiometers illustrating Sir W.Crookes' research on electrical discharges in a vacuum
1879-1888
Radiometer, double-walled
1800-1899
"Pifco All-in-One Radiometer" 500 ohms/volt multi-range meter
Small radiometer in brass case, c.1910
1890-1928
Puluj electrical radiometer
Large radiometer with suspended pith vane
1800-1899
Radiometer on stand
1800-1899
Radiometer with metal cup vanes and electrodes
1800-1899
Radiometer with suspended arrow vane
1800-1899
Crookes' electrical radiometer
1879-1888
Radiometer multi-range test meter
Wehnelt radiometer
1909-1925
Wehnelt radiometer
1909-1925
Pifco 'all-in-one radiometer' test meter
Presentation model photometer/radiometer
1950-1970
Automatic Titrator by Radiometer (Denmark) model TTTIB with recorder and control unit
Radiometer titrator, Copenhagen, 1969
1969
Radiometer on stand with two mica discs
1800-1899
Puluj electric radiometer
1888
Radiometer with rectangular cane and pith vanes
1800-1899
Radiometer with small transparent circular vanes
1800-1899
Radiometer between two mica discs
1800-1899
Lovibond chromoradiometer for the estimation of X-ray dosage in radiotherapy using Sabourand-Noire pastilles
1915-1939
Crooke's Radiometer (dated 1877)
1877
Radiometer on stand; etched on glass "No 1277 iron and gold
1800-1899
Radiometer with circular metallic vanes
1800-1899
Radiometer with pentagonal pith vanes on stand
1876
Crookes radiometer with four diamond-shaped vanes
1965-1979
Solomon's ionoquantimeter
1910-1930