Thermocouple Extension and Compensating Cables

These cables can also be termed as instrumentation cables, since they are used for process temperature measurement. The construction is similar to paired instrumentation cable but the conductor material is different. Thermocouple extension or compensating cables essentially transfer reference junctions to the control room.

Thermocouple’s are used in processes to sense temperature and is connected to the pyrometers for indication and control.

The thermocouple and pyrometers are electrically connected by Extension/Compensating Cables. The conductors used for these cables are required to have similar thermo – electric (emf) properties as that of the thermocouple used for sensing the temperature.