In the thermocouple, two electrically conductive conductors made of different metals are connected at the ends (thermocouple), thereby producing a thermoelectric circuit. The weld point forms the "measuring point" and the other end with the free wires forms the "cold junction". When the "measuring point" of this thermoelectric circuit is heated, a current flows through the circuit and a weak electrical voltage (known as the thermoelectric voltage) is generated.
If the measuring point and the reference junction have the same temperature, a thermoelectric voltage is not generated. The strength of the thermoelectric voltage (also know as the electromagnetic force), primarily depends on the materials of the thermocouple and the size of the temperature differential. The sensors (thermocouple) meet the requirements of IEC 60584 and ANSI MC96.1.
General industrial applications
The TMT162C thermocouple thermometer comprises a measuring insert with a type J or K thermocouple and an electronic field transmitter with HART®, FOUNDATION Fieldbus™ or PROFIBUS® PA protocol.