Model TC80 series thermocouples were developed to measure extremely high temperatures. These high-temperature thermocouples comply with DIN EN 50 446. The thermo electric wires of the thermocouple fitted within the thermowell are contained either in the capillary holes of a ceramic insulating tube or in the capillary holes of an insulating rod. A thermowell made from high-temperature alloy metal or hightemperature ceramic, with or without an additional inner tube, protects the thermocouple from the process medium as well as mechanical and chemical damage.
A wide selection of process connections, e.g. stop flanges, threaded collars and solid welded flanges, permit direct mounting to the process. For particularly critical applications there are designs with inert gas or compressed air purging or with pressure tight sealing. Of course extremely robust thermowell assemblies can also be used.
Optionally a transmitter can be fitted. One of the advantages of a built-in transmitter is the increased reliability of the signal transmission. Between the transmitter and the control room, more-economical copper cable can be used rather than specific thermocouple or compensating cable. A cold junction is integrated in all WIKA transmitters.
