When Thermocouples or RTD’s or any other sensors are exposed to harsh atmospheres they are damaged. This damaged due to mechanical abused or chemical contamination can be avoided by the use of protection tubes or Thermowells.
Thermowells and Protection Tubes are closed at one end, normally the harsh environment or process end, and opened at the termination end, various methods are used to assemble the tube, sensor, and connection head with termination into the process. Depending on the chemical or mechanical environment to which the Sensor will be subjected the material for the protection tube is selected. The table below shows the most popular.