Thermowell Manufacturers and Companies

IQS Directory provides a detailed list of thermowell manufacturers and suppliers. Find thermowell companies that can design, engineer, and manufacture thermowells to your specifications. Peruse our website to review and discover top thermowell manufacturers with roll over ads and complete product descriptions. Connect with the thermowell companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of copper thermowells, cemented carbide thermowells, and extra long thermowells of every type, IQS is the premier source for you.

  • Garland, TX

    If you are looking for quality thermowells, you’ve come to the right place! We carry a full like of thermocouple products and we offer quality, variety, and excellent customer service. Since 1972, we have dedicated our time and energy to finding the best manufacturing techniques for our products. Find out more when you visit us online today!

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  • Quakertown, PA

    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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  • Mississauga, ON

    Kelvin Technologies is a high-quality thermocouple manufacturer, representative, and distributor for all of your electrical heating, temperature controlling, and temperature sensing requirements. Our products are engineered and manufactured in-house to address specific requirements, such as higher temperatures and more compact profiles. With over 100 years of combined experience, all of us at Kelvin Technologies take pride in the quality of product and level of service we provide our customers.

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  • St. Francis, MN

    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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Thermowells Industry Information


Thermowells are tubular fittings designed to protect temperature sensors used in industrial monitoring processes. Processes like these most often exist in the cosmetics, food processing, pharmaceutical petrochemical, and refining industries, along with all those others that deal in processing. Typically, they’re installed in piping systems. Temperature sensors protected by thermowells include thermocouples, resistance temperature detectors, and temperature probes.

Quick links to Thermowells Information

How Thermowells Work

Thermowells provide a barrier between sensors and the outer atmosphere after the sensors are placed inside them through their open end. When a sensor is placed inside a thermowell, it is almost always spring-loaded, an action that makes sure that the outside metal tip of the sensor touches the inside metal tip of the thermowell. This metal-to-metal contact ensures that the heat transferred to the thermowell wall by the process fluids is then passed onto the sensor, so that it can work. The atmospheres in which they may be immersed include those that feature the presence of high flow velocities, high pressures, or corrosive substances.

Often, thermocouples cannot function without thermowells, because the substance or environment in which they are being placed is so incompatible to contact with them. In addition, not only do thermowells protect sensors from the hazards of being physically immersed into inhospitable environments and/or substances, they also protect sensors from secondary process forces, such as corrosion, vibration, abrasion, and mechanical force.

Materials Used in Manufacturing Thermowells

Thermowells are typically constructed from strong metal bar stock materials like stainless steel (any grade) and carbon steel, lesser metals like monel and brass, and, on occasions of low temperatures and/or pressures, Teflon.

Thermowell Design and Customization

Material construction is decided per a material’s corrosion resistance, chemical reactivity, and reaction to temperature changes, and how these behaviors match the needs of an application. Thermowells are made using a few different frequently implemented designs, such as sanitary, retractable, threaded, weld-in or screw-in, and flanged. These design names refer to the connection type used to mount the thermowell into the process stream. "Sanitary," for instance, refers to a sanitary cap process connection. In addition, they are typically available in a variety of standard shapes and sizes and can usually be custom ordered.

Customizable configuration factors include bore diameter, stem length, and lagging extensions. When selecting or designing these, thermowell manufacturers consider the thickness of the substance the thermocouple will be monitoring and the pipe fittings and insulation. Bore diameter, which is the size of the thermowell opening, and stem length, which is the distance from the thermowell opening to the wall of the pipe or tube, are decided in part by substance thickness. Meanwhile, fittings and insulation impact the nature of a lagging extension, which is an extension of the thermowell’s hex length that allows it to extend through insulation or walls.

Benefits of Using Thermowells

Thermowells are an excellent investment not only because they protect sensors, but also because they provide system operators with much easier access to sensors and thermocouples. This makes all the difference when the system needs checking, a sensor is in need of removal or repair, or when a probe needs to be moved to a different point inside the processing system without any disruption to the process itself.

Points to Consider When Purchasing Thermowells

Thermowell users need to be on the lookout for a few potential problems associated with them. One of these is flow-induced resonance. Flow-induced resonance is a condition that occurs when vortex shedding, or an oscillating flow, takes the place of regular flow. This condition, which is mostly a risk for cross-flow applications, frequently leads to the fatigue failure of both the thermowell and the sensor inside.

Another condition for which to be watchful is bending fatigue. Bending fatigue occurs at the base of a thermowell. If a thermowell is bombarded with extreme force, it may experience catastrophic bending and failure all at once. Thermowells working in low-pressure environments can fall prey to bending fatigue as well, but in their case, the failure is gradual, many times beginning a string of sensor failures. To learn more about thermowell selection, installation, and care, interested parties should speak at length with an experienced, trustworthy manufacturer.

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Thermowells Informational Video