Thermowells are tubular fittings used to protect temperature sensors installed in industrial processes. A thermowell consists of a tube closed at one end and mounted in the process stream. If the sensor fails, it can be easily replaced without draining the vessel or piping. .Metal thermowells are available in Brass, Carbon Steel 304 and 316 SS and Monel.
Ceramic protection tubes are used for applications where contamination from hostile environments or the cutting action of concentrated and direct flame impingement are factors. Such conditions usually require a noble metal thermocouple such as platinum or platinum alloys.
Function:-
A thermowell serves as a protective barrier between a thermometer and the process media. Thermowells are often found in industrial process systems within refineries and petrochemical and chemical plants. In addition to protecting thermometers, thermowells provide easier serviceability and reduce operating costs.