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Thermowells

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About Thermowells

Thermowells are containers inserted into an existing pipeline or process device that accept numerous types of temperature probes including RTDs and thermocouples. Thermowells are used to facilitate the repair of temperature sensing devices without interrupting the process being monitored. 

Thermowells are available in three main barrel or shank design types.  The barrel, or shank, is the container style apparatus, which is inserted into the process flow.  Since thermowells are inserted directly into the process flow, the goal is to allow for measurement while causing as little restriction of flow as possible.  Each of the three types of thermowells offer advantages and in some cases disadvantages in terms of reading and flow disruption.  Straight shank designs are the most common.  They are cost effective and require no extra machining.  However, they tend to involve a high degree of surface area, which can disrupt flow.  They are not recommended for use in high velocity flow systems.  Stepped shank thermowells have less surface area than straight shank types, and therefore allow smoother velocities around the barrel, as well as increased sensitivity for the inserted probe.  Tapered shank thermowells have the lowest degree of surface area.  Like stepped shank devices, they offer increased sensitivity, but with greater stiffness. They can be used in high velocity flow systems.

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Engineering Web: Thermowells

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Thermowells, Thermocouples, Thermocouple Thermowell, RTD's,...

See ARi Industries, Inc. Information
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Part Numbers for Thermowells

Part # Distributor Manufacturer Product Category Description
4LU93 Grainger Industrial Supply DRESSER INSTRUMENTS Thermowells Thermowell,Threaded
2F209 Grainger Industrial Supply DRESSER INSTRUMENTS Thermowells Thermowell,Threaded
1EVC8 Grainger Industrial Supply TRERICE Thermowells Thermowell,Industrial,Brass,3 1/2 In
1EVF5 Grainger Industrial Supply TRERICE Thermowells Thermowell,Bimetal,316SS,12 In
2AFG9 Grainger Industrial Supply TRERICE Thermowells Thermowell,Bimetal,Stem 9 In,316 SS

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