Fixed focus radiation pyrometer, temperature indicator, by Foster Instrument Co. Ltd., Letchworth, England, 1950. Temperature range 700-1400°C, temperature indicator in mahogany case with glass display cover. Photo-Electric Radiation Pyrometer (Temperature Indicator), 1950 1950
Temperature indicator, designed by Callendar and Griffiths, mounted on gimbals. Temperature indicator 1900-1928
Two Bikini temperature indicators typ TiB2, S/N 357 + 744. Bikini temperature indicators type TiB2 1960
Féry radiation optical pyrometer, with thermocouple, temperature indicator; Féry telescope with tripod stand, by The Cambridge Scientific Instrument Company Limited, Cambridge, England, 1910-1914. British patent 5668, 1905, serial no. 17984. Féry Radiation Pyrometer (Temperature Indicator), 1910-1914 1910-1914
Stereo-pyrometer (optical temperature indicator), made by W. & J. George Ltd., London & Birmingham, 1906-1925. Stereo Pyrometer (Temperature Indicator),1906-1925 1906-1925