Fosteronic electronic continuous balance circular scale temperature indicator (serial No. E10088) by Foster Instrument Co. Ltd., Letchworth, Hertfordshire, England 1960. For use with nickel-wound resistance thermometer. Fosteronic Pyrometer Indicator, 1960 1960
Pivoted coil electrical temperature indicator with wall bracket, by The Cambridge Scientific Instrument Company Limited, London and Cambridge, England, 1910-1914. Temperature range 0-1000°C, Serial No. 18603 (see note). Pivoted Coil Electrical Temperature Indicator, 1910-14 1910-1914
Unipivot pattern electrical temperature (pyrometer) indicator by Robert W. Paul, London, 1910-12. Range 0-900°C. Serial No. 0568. Electrical Temperature Indicator, 1910-1912 1910-1912