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These are used in industrial monitoring processes which may include a corrosive substance or high pressure and flow velocity, and the thermowells provide a protective barrier between the thermocouple and the liquid, gas or environment which it is being used to monitor. Read Moreā€¦

Thermowells Thermowells are receptacles used to protect temperature sensors such as resistance temperature detectors and thermocouples.

Leading Manufacturers

Garland, TX  |  800-889-5478

In business since 1972, Thermo Sensors Corporation is a leading thermocouple manufacturer of an array of many products and services. Thermo Sensors provides the chemical, petrochemical, refining, food, pharmaceutical and other industries with options of standard & special designs. Contact them for information about their products, competitive pricing & rapid delivery!

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Thermo Sensors Corporation $$$

Quakertown, PA  |  800-784-3783

We manufacture a full line of Thermocouples to fit your application. Temperatures from cryogenic to 4000F, and sizes ranging from needle thin to several thousand pound multipoint temperature sensors. In addition to our standardized product lines, TTEC offers design solutions to meet the specific needs of your application. Our products are in use worldwide, in almost every industry. Give us a call today to discuss your requirements.

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Thermocouple Technology, LLC $$$

St. Francis, MN  |  800-272-5709

Temperature Specialists, Incorporated is a manufacturer of quality thermocouples. Temperature Specialists provide solutions for your sensing needs by building to meet your specifications. Feel free to visit their comprehensive and helpful website for full descriptions of their state-of-the-art line of quality products and services or call their experts with any questions.

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Temperature Specialists, Inc. $$$

Danvers, MA  |  978-777-0070

Backer Hotwatt manufactures a complete line of electric heating elements for a wide range of uses. We offer a broad product line of cartridge heating elements, tubular heating elements and immersion heating elements. Custom heating elements-crankcase heaters, ceramic heaters and more are available, such as heating coils & ceramic heating elements. We have been creating heating elements for 60 years.

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Backer Hotwatt, Inc. $$$

Reno, NV  |  800-257-3526

As a supplier of thermal products such as thermostats, thermistors, thermocouples, panel instruments, photo cells and knobs, our range of products are ready for shipment to your door. Our thermistors are used for sensing surface temperatures. We can also manufacture special electronic controls.

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Selco Products Company $$$
placeholder image Thermo Sensors Corporation Thermocouple Technology, LLC Temperature Specialists, Inc. Backer Hotwatt, Inc. Selco Products Company

Used in applications for petrochemical, refining, food processing, pharmaceutical, cosmetics and other processing industries, temperature sensors and thermocouples are often subject to pressure or incompatible substance contact, therefore a thermowell is used to protect them. Aerodynamic or hydrostatic forces typically act upon the thermowells which can be designed to be low pressure or high pressure depending on the nature of the application. Thermowells further protect thermocouples from damage as a result of other process forces such as vibration, corrosion or abrasion, or from mechanical damage.

Thermal Devices Lagging Thermowell Thermowells - Thermal Devices

One of the main benefits to using thermowells, apart from the protection of the sensor or temperature probe, is that thermowells provide easier access to the temperature sensors and thermocouples within the measuring system. They facilitate in the checking, repair or removal of the sensor, or in the relocation of the probe to a different point within the process system without disturbing or compromising the process.

Common designs of thermowells include: threaded, flanged, weld-in or screw-in, retractable and sanitary. There are a number of standard size and shape thermowells which are suitable for use in many different applications; however, custom thermowells can be designed to fit into a process with specific requirements and restrictions. Some important factors to keep in mind when determining the most suitable thermowell for an application include: stem length, bore diameter, lagging extensions and the thickness of the substance the thermocouple is being used to monitor.

The bore diameter is the size of the opening that the temperature probe will be put into and the stem length is the distance from the bore to the wall of the tube or pipe. Lagging extensions take into consideration the pipe fittings and insulation. Material choice for the construction of thermowells should also be carefully considered with regard to chemical reactivity, corrosion resistance and a material's reaction to temperature increase or decrease. Commonly used materials for thermowells include durable metals such as carbon steel and stainless steel, as well as other materials such as monel and brass. For flanged thermowells, appropriate flange size and rating will also need to be determined.

Thermowells Informational Video