Thermocouple Instruments

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

All other thermocouple instruments are integral components to systems that use or generate heat, usually by gas. Read More…

Thermocouple Instruments Thermocouple instruments are simple, effective and reliable devices used to measure and monitor temperature. They may be portable and handheld devices that are light weight, compact and used in field applications.

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!

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. 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.

Request A Quote

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.

Request A Quote

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.

Request A Quote

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.

Request A Quote

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

There are many different types of thermocouples, including type K, which is by far the most common for general use, as well as type E, J and N, which are also universal, platinum types B, R and S that use platinum or platinum-rhodium alloy wires, as well as T, C and M, all of which use different metal alloys as temperature sensors and have varying temperature ranges. In general, thermocouple devices operate in temperatures ranging from -420º F all the way up to 3300º F, although a single thermocouple alone isn't able to vary in temperature this much.

Thermocouple instruments are safety devices that prevent gas leaks, explosions, over heating and system damage in the petrochemical, oil and gas, water heating, pharmaceutical, food, brewing, power generation and metal fabrication industries. Furnaces, gas fireplaces, gas water heating systems and diesel engines also use thermocouples as heat sensors for temperature measurement of liquids or gases.

All thermocouple instruments are simple devices composed of only a few parts-two dissimilar metal alloy wires that are joined together at one end, insulating and protective tubing around the wires, and a thermostat, which attaches to the other end of the wires. Portable thermocouple instruments are battery powered and most likely have a digital readout. All thermocouples use the conjoined end wires as a sensor that is placed directly in the area to be measured or monitored. The heat generates electrical voltage that conducts its way up the two wires.

The voltage changes in proportion to the temperature, therefore the voltage indicates a temperature difference between the area at the sensor end of the wires and the room temperature thermostat attached to the opposite end of the conducting wires. That temperature difference is deduced from a measurement of the difference in thermoelectric potentials developed along the wires. If the thermocouple measures a temperature that is too high or low, it will signal an alert or system shut down. The most accurate thermocouple instruments are platinum or platinum-rhodium types R and S, but the most widely used are K because of its wide temperature range. Type K uses aluminum and nickel alloy for one wire and a chromium nickel alloy for the other, both of which are inexpensive metals.

Thermocouple Instruments Informational Video