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.

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  • Temperature Specialists: Quality Temperature Sensing Devices Built to Your Specifications

    Thermowells Temperature Specialists Inc. has been specializing in wire wound glass coated resistance temperature detectors (RTDs) since 1977. In addition to RTDs, we manufacture a wide range of thermocouple assemblies, thermowells and custom hot wire anemometers, mold plastic parts and miniature welding. Our quality temperature sensing devices are used by our customers in various industries. Read more......

  • Thermocouple Innovations: Self-Calibrating Sensors

    Thermowells A temperature sensor is an important part of many different industrial equipment pieces and products. Temperature sensors measure the temperature of industrial processes, machines, liquids, and other elements of the daily manufacturing process. If the sensors do not provide accurate readings, then a factory could face problems with production, safety, and a variety of other issues. Unfortunately, many sensors become out of alignment without the factory's knowledge. The sensors can become inaccurate due to age, field exposure, manufacturer error, or a variety of other reasons. When there is no...

  • The Best Places to Use High Temperature Thermocouples

    Thermowells High temperature thermocouples can test and identify the temperature of any material or liquid from 2,000 to over 4,500 degrees Celsius. Thermocouples work by reading the electrical energy inside of the material or liquid and projecting the energy signal onto a small screen. The thermocouple then transfers the energy reading to a temperature reading so the user can identify the exact temperature of the material. This is extremely useful in industrial settings where temperatures must remain exact or a chemical process can mess up, causing serious problems with the...

  • Deciphering Thermowell Use In Chemicals

    Thermowells Thermowells are extremely versatile pieces of equipment. They have to be, what with all of the materials into which they are immersed. They serve to protect the heat sensing element of a thermometer, and very often of a thermocouple unit. What is important to recognize is that not all thermowells are created equally. This isn't to say that each thermowell doesn't do the job it is supposed to do, but rather that the materials into which you will be immersing your thermowell will affect how well the thermowell works,...

  • Choosing the Right Thermowells

    If you've ever used a thermometer to check the temperature of something you're familiar with its basic construction. Thermometers are usually just narrow bits of metal encased in a protective sleeve. That protective sleeve is called a thermowell, and, like the name implies, it's a space in which the heat detecting part of the thermometer rests. It's a crucial part of the heat monitoring process, since it keeps the integrity of the thermal unit intact. There are a few things to think about when purchasing the kind of thermowell you're...

  • IQS Newsroom Featured Profile: Thermal Devices, Inc.

    by Amy Harris, IQS Editor Approaching its 50th year in the industrial heating business, Thermal Devices, Inc. is an experienced provider of temperature sensors, temperature controls and electric heaters to manufacturing companies. Unlike many supply companies offering a list of products without the technical knowledge to back it up, the team at Thermal Devices, Inc. actually specializes in the application of its heating products. The customers can rest assured knowing the proposed solutions for their heating needs are coming from knowledgeable and trained personnel. The company is well qualified to...

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, temperature probes and more.

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, among others. 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 only thermowells protect sensors from the hazards of being physically immersed into inhospitable environments and/or substances, but they also protect sensors from the secondary process forces, such as corrosion, vibration, abrasion and mechanical force.

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. 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 said 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.

Thermowells are an excellent investment not only because 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 the process itself. 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 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.

Welded Tube Skin Thermocouple
Metal Sheathed Thermocouple Element
Thermal Devices Thermocouple
Lagging Thermowell – Thermal Devices
Standard Thermowell – Thermal Devices
TCS Thermowells- Thermo Sensors Corporation
Boiler Tube Thermocouple
Surface Mount Thermocouple
General Purpose Thermocouple
Series 10000 Thermowells – Thermocouple Technology, Inc.
KWIK-SHIP™ Thermowell Assemblies – Thermocouple Technology, Inc.
Socket Weld Thermowells – Thermo Sensors Corporation

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