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Immersion Heaters

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Immersion heaters are the answer for situations in which fast, efficient heat transfer is required. These heaters are used by the process heating industry for a wide range of applications. Read More…

Immersion Heaters Immersion heaters are electric heaters that are used when it is necessary to immerse a heater in the substance being heated, such as water, oil, air and other gases, chemical solutions, mild acids, electroplating and salt solutions.
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Leading Manufacturers

Danvers, MA  |  978-777-0070

Backer Hotwatt is a superior designer & manufacturer of electric heaters and related heater accessories for various OEM & industrial applications.

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Backer Hotwatt, Inc. $$$

Bristol, CT  |  860-582-6776

For more than 70 years, Ulanet™ has been engineering and manufacturing electric heaters, cartridge heaters, immersion heaters, tubular heaters, miniature strip heaters and bolt hole heaters, as well as industrial heaters and appliance thermostats.

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Ulanet™ $$$

Wood Dale, IL  |  888-268-6396

We are a leading innovator of electric heaters and our products are ideal for a wide range of industries. Here at TEMPCO Electric Heater Corporation we put your needs first. All of our heaters are fairly priced and come with top of the line support. Turn to us for quick turnaround and long-lasting solutions. Give one of our representatives today!

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TEMPCO Electric Heater Corporation $$$

Leavenworth, KS  |  913-651-4420

Heatron is a global designer and manufacturer of custom heating element components for OEM applications such as medical devices, lab equipment, semiconductor processing, thermal management, and LED lighting design and assembly. Products include flexible heating elements, thick film heating elements on ceramic or metal, cartridge heating elements, LED modules and specialty and custom heater and LED module designs.

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Heatron, Inc. $$$

Salem, MA  |  800-808-4328

Thermal Circuits engineers and manufactures ceramic heaters as well as infrared panel emitters, air, molded and surface heaters. We also design and produce heaters and assemblies for our etched foil elements. With a multitude of heater designs and materials, your heater solution starts at Thermal Circuits!

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Thermal Circuits Inc. $$$
placeholder image Backer Hotwatt, Inc. Ulanet™ TEMPCO Electric Heater Corporation Heatron, Inc. Thermal Circuits Inc.

A common type of immersion heater is the screw-plug immersion heater, utilized inside of tanks. The tubular heating element of the heater is inserted into a threaded opening on the side of the tank near the bottom, and then the brass, steel or stainless steel screw plug end of the heater is secured into place. Applications include hot water tanks for domestic use.

Another basic immersion heater is the flanged immersion heater. Instead of a screw plug end, the tubular heater is welded or brazed into a round or square carbon steel pipe flange. The heater is then fitted into a pipe body, tank or pressure vessel.

Both kinds of immersion heaters are extremely efficient and economical because their energy is generated from within the substance that needs to be heated. Screw-plug configurations include only a few heating elements; however, flanged configurations can hold bundles of heating elements for larger wattage requirements.

All immersion heaters consist of two major parts: the tubular heating element(s) that is immersed in the liquid or gaseous substance to be heated and the electrical terminal that remains outside of the liquid or gas. The electrical unit extends from the screw-plug or the flange end of the heater and is protected by a NEMA enclosure. NEMA 1 enclosures are for general purpose applications; NEMA 4 enclosures are moisture resistant for exposed-to-the-elements conditions; and NEMA 7 enclosures are explosion resistant and are used in hazardous locations. The enclosures could also include a thermostat control, and thermowells are utilized on the heating element end of the heater to protect the temperature sensor.

Depending on the corrosive level the heating elements will encounter, several different sheath materials are available for covering and protection. Some common materials used for this purpose include titanium, Incoloy, Inconel, steel, stainless steel and copper, each with its own ideal applications.

Copper is used for potable water; steel is good for hydraulic oils; stainless steel is ideal for mild acids; and Incoloy is great for alkaline solutions and high temperature air and gases. Immersion heaters come in a variety of shapes, sizes and configurations. Important considerations when choosing an immersion heater include the best screw-plug or flange size for the application, available length space for the heating elements, the appropriate watt density, the necessary electrical terminal and the proper sheath for the solution being heated.

Immersion Heater Informational Video