WIKA Thermocouple for Flue Gas Temperature Measurements (TC81)

With protection tube model TW81


  • Blast furnaces, hot blast stoves
  • Annealing and heat treatment processes
  • Waste and hazardous waste incineration
  • Large heating systems, heat generation

Special features

  • Application ranges up to +1,200 °C (+2,192 °F)
  • Protection tube from heat-resistant steel
  • Measuring insert replaceable
  • Gas-tight process connection (option)

Sales Contact (Wika.sales@asyatrafo.com)




These straight thermocouples consist of a form B connection head, a measuring insert in accordance with DIN 43735 and a model TW81 protection tube. In addition to DIN form A or C protection tubes, customer-specific versions are possible. Possible process connections are stop flange or threaded bushing – the latter can realise a gas-tight connection. These thermometers are suitable for gaseous media in the low pressure range (up to approx. 1 bar). Different protection tube materials, with or without enamelling, ensure matching to the respective thermal load.

Measuring insert is replaceable. This enables inspection, measuring equipment monitoring or, when servicing is necessary, replacement while the plant is running. The choice of standard lengths assists with short delivery times and the possibility of stocking spare parts. Protection tube material, connection head and sensor can each be selected to suit the respective application. Optionally, a transmitter can be built in. Among the advantages of a built-in transmitter is an increased reliability of the signal transmission.