Electronic temperature controller, Tektor proximity switch, by Fielden (Electronics) Limited, Manchester, England, 1945-1950. Model type SL1, Serial No. 1699. Electronic Temperature Controller, 1945-1950 1945-1950
Lowry's spiral gas regulator thermostat, (temperature controller), 1907-11. Lowry's Spiral Gas Regulator (Temperature Controller), 1907-11 1907-1911
Jackson electrical thermoregulator temperature controller, by A. Gallenkamp & Co. Ltd., London, England, 1948-1950. Intended for use in the laboratory to control ancillary electrical equipment, temperature range 0-100°C. Jackson Thermoregulator (Temperature Controller), 1948-1950 1948-1950