Thermocouple consists of two wires, each made of different metal, welded together at one end. When the
welded point(measuring junction) is heated, a thermoelectromotive force is produced that is proportional
of the temperature difference between the welded point and the other end (reference junction).
Therefore, by messuring this thermoelectromotive force either with the reference junction temperature kept
constant or by using an automatic compensation curciut, the measuring junction temperature can be measured.
The thermoelectromotive force of a thermocouple is independent of the diameter or length of the wire used and
depends only on the type of wire used.
These thermocouples are typically used in high temperature processes in furnaces in the ceramic industry,
glassmaking, foundry and in places where the use of metallic protections due to high temperatures is not allowed,
chemical attacks or sometimes at lower temperatures where the media or the environment atmosphere is harmful to
metallic tubes.
Main application at temperatures between 1000°C and 1650 °C.
