WIKA Thermowell for Weld-in or with Flange (TW55)

Version per DIN 43772 form 4, 4F


  • Chemical industry, process technology, apparatus construction
  • For high process loads

Special features

  • Version per DIN 43772
  • Model TW55-6: Form 4 to weld-in
    Model TW55-7: Form 4F with flange
  • For highly corrosion-resistant coating (model TW55-7)

Sales Contact (Wika.sales@asyatrafo.com)




Each thermowell is an important component of any temperature measuring point. It is used to separate the process from the surrounding area, thus protecting the environment and operating personnel and keeps aggressive media, high pressures and flow rates from the temperature sensor itself and thereby enables the thermometer to be exchanged during operation.

Based on the almost limitless application possibilities, there are a large number of variants, such as thermowell designs or materials. The type of process connection and the basic method of manufacture are important design differentiation criteria. A basic differentiation can be made between threaded and weld-in thermowells, and those with flange connections.


Furthermore, one can differentiate between fabricated and solid-machined thermowells. Fabricated thermowells are constructed from a tube, that is closed at the tip by a welded solid tip. Solid-machined thermowells are manufactured from solid bar stock.

The TW55 series of solid-machined thermowells for weld-in or with flange connection are suitable for use with numerous electrical and mechanical thermometers from WIKA.

Due to their design to DIN 43772, these thermowells for high process loads are suitable for use in the chemical industry, process technology and apparatus construction.