Coil Heaters are used in operations involving heating of cylindrical-shaped surfaces for temperatures up to 1800°F (982°C) where precise temperature control is essential. The design incorporates a built-in thermocouple, with a grounded junction terminating at the end of the cable opposite to the lead end.
Heating elements contain an electric current, which flows through the coil or ribbon or wire and becomes very hot. The element converts the electrical energy passing through it into heat, which spawns outward in every direction.