Thermocouple Assemblies banner

Water Heater Thermocouples

A reliable source for Thermocouple information and leading Thermocouple Companies & Manufacturers.

They are used primarily to prevent the dangerous release of natural gas within a residential environment, which could cause an explosion, fire or even death if inhaled over an extended period of time. Read More…

Water Heater Thermocouples Water heater thermocouples are important safety devices in most residential gas-fueled water heating systems.
Request for Quote

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.

Request A Quote

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.

Request A Quote

Thermocouple Technology, LLC $$$

Mississauga, ON  |  905-238-7060

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.

Request A Quote

Kelvin Technologies, Inc. $$$

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.

Request A Quote

Temperature Specialists, Inc. $$$

Hudson, MA  |  800-343-4492

Since 1971, Thermalogic has been a leading manufacturer of electronic temperature and humidity control and sensors. Here at Thermalogic we work with our clients in a partnership to build a lasting business relationship. All of our products have quick turnaround times, including custom designs, and are thoroughly tested prior to being sent out. At Thermalogic we pride ourselves on our high quality, industrial grade, reliable products. Contact us today to get started!

Request A Quote

Thermalogic® Corporation $$$

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.

Request A Quote

Backer Hotwatt, Inc. $$$

Columbus, IN  |  812-372-0281

We have over 81 years of successful manufacturing experience and we offer a wide range of solutions. Our thermostats are utilized in industries including HVAC, process heating, food service, laboratory tank heating, industrial system control, and more. We have made it our mission to remain on the forefront of our industry and we work closely with our customers to ensure maximum satisfaction.

Request A Quote

Ulanet™ $$$
placeholder image Thermo Sensors Corporation Thermocouple Technology, LLC Kelvin Technologies, Inc. Temperature Specialists, Inc. Thermalogic® Corporation Backer Hotwatt, Inc. Ulanet™

A water heater thermocouple is designed like a standard type K thermocouple, composed of 2 dissimilar metal alloy wires that are welded together at one end to measure and monitor temperatures. Water heater thermocouples are installed on the exterior of the water tank and often have a dial that allows altering of the temperature settings, although when most measure heat that generates a current of 20 millivolts or less, the gas is automatically turned off.

Thermo Sensors Right Angle Thermocouple Assembly Water Heater Thermocouple - Thermo Sensors Corporation

Thermocouple instruments for water heaters are connected by a series of metal tubes to the pilot light and main burner, and can easily be replaced if needed. They are seen in almost every residential or smaller commercial building such as offices and stores that have a hot water system which is heated by gas. Some newer systems have replaced a standing pilot light and thermocouple with solid state controls that are operated by electronic ignition.

The main purpose of a water heater thermocouple is to ensure the pilot light of a water heating system is working properly. The pilot, which ignites the main gas burner used to heat the tank reservoir, ensures that the gas is immediately ignited and does not build up within the tank, a safety hazard that is likely to end in an explosion. As a temperature sensor, the thermocouple monitors whether or not the pilot light is burning by sensing the temperature or heat being produced. If it has stopped burning, the thermocouple stops the flow of gas before it is able to build up at the burner head.

The thermocouple is mainly composed of two wires of differing metals that are joined at a junction that forms a sensor tip. This sensor of thermocouple wire is positioned directly into the hottest part of the pilot light’s flame. The wires are protected by a metal covering and travel to a thermostat which measures the temperature. The heat of the pilot light produces an electric current that travels down the wires. If the thermocouple measures the current and determines it is hot enough, it sends a signal to the gas supply, causing it to open, or remain open. If the heat is too low, the gas supply is turned off. Like other thermocouples or temperature sensors, those used in water heating systems are very reliable, ensure safety and last for long periods of time.

Water Heater Thermocouples Informational Video