Working Principle of Thermocouple Instruments

Working Principle of Thermocouple Instruments Points : Working Principle of Thermocouple Instruments The action of a thermocouple instrument depends upon the principle that when the cut tent under measurement is passed through a fine wire resistor or heater and the heat generated in it is transferred to a thermo-junction connected to an indicating device, usually a sensitive PMMC instrument, an e.m.f. Known as thermo-emf, is developed and indicated on the indicating device.