Thermocouple consists of two STRIPS or wires made up of different metals and joined at one END. The TEMPERATURE at that juncture induces an electromotive force (EMF) between the other ends. As the temperature goes up the emf also increases. Through standard charts and tables the corresponding temperature can be found out.

The relationship between the thermocouple OUTPUT and the temperature is quite non linear. Different metallurgies produce different outputs. The different metallurgies and different lineararities result in different thermocou0le designations such as “J”, “K,”, “N”, “L”, etc.

Thermocouple consists of two strips or wires made up of different metals and joined at one end. The temperature at that juncture induces an electromotive force (emf) between the other ends. As the temperature goes up the emf also increases. Through standard charts and tables the corresponding temperature can be found out.

The relationship between the thermocouple output and the temperature is quite non linear. Different metallurgies produce different outputs. The different metallurgies and different lineararities result in different thermocou0le designations such as “J”, “K,”, “N”, “L”, etc.