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SA Instrumentation & Control Buyers' Guide


High temperature thermocouple with additional protection
July 2017, Temperature Measurement

The new TC84 high temperature thermocouple from WIKA features the highest safety and a long service life. Its resilience is based on a sapphire protection tube in combination with a two-stage safety chamber. The measuring instrument is also available in ATEX and IECEx certified versions. Typical applications for the TC84 are gasification reactors with process temperatures up to 1700°C and pressure loads up to 65 bar or sulphur recovery units. In the patented design of the measuring instrument, the precious metal thermocouple is shielded from damaging process influences through two protection tubes – an external ceramic tube and an internal tube made of monocrystalline sapphire glass, which effectively delays the poisoning of the thermocouple. In the event of a failure, the dual sealing system of the safety chamber prevents the escape of toxic media.

The construction of the thermocouple also allows for economy. If a TC84 is damaged following extreme loading it can be repaired through the exchange of the wetted parts so a completely new purchase is therefore not required. The sapphire protection tube also eliminates the need for expensive purging with inert gas to protect the thermocouple.

For more information contact WIKA Instruments, +27 (0)11 621 0000,,

Supplied By: WIKA Instruments
Tel: +27 11 621 0000
Fax: +27 11 621 0060/59
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