Thermocouples/

Temperature Controls

Temperature controls are devices that monitor and measure the temperature of a gas or liquid for safety applications. In systems that use a heat source, they adjust the passageway of heat energy into or out of the space in order to achieve a desired or safe temperature. They accept inputs from temperature sensors or thermometers, determine the temperature and send a control signal to alter the temperature until it is at the correct level.

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Thermo Sensors Corporation
Garland, TX
800-889-5478
Since 1972, Thermo Sensors Corporation has been manufacturing quality manufactured products and equipment to the chemical, petrochemical, refining, food, pharmaceutical as well as other industries using both standard and custom designs. Thermo Sensors Corporation is dedicated to bringing you the temperature controls you need. Your solution is just a phone call away.
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Thermal Devices
Mt. Airy, MD
800-282-9100
Thermal Devices specializes in the sale and application of temperature controls and other industrial electric heaters, electrical temp. devices, SCR power controls, heating cable and related accessories. Purchase on-line by selecting products at the top or simply contact Thermal Devices for assistance in locating or selecting a heater or any other product. Thanks for visiting!
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Temperature Specialists, Inc.
St. Francis, MN
800-272-5709
You can't find a better place for temperature controls than Temperature Specialists, Incorporated. Their full line of precision manufactured merchandise is what quality really means and the experienced professionals of Temperature Specialists has a daily mission to help you find the best solutions for all your sensing needs. Go to TS, Inc.'s website to learn more or call the TC team today!
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Thermal Corporation
Madison, AL
800-633-2962
Thermal Corporation was founded in 1969 as a catalog-house and distributor of thermal supplies. Throughout the years we have grown immensely and received the Alabama U.S. Senate Award of Excellence in Continuous Productivity and Quality Improvement in 1995. Some of our products include band heaters, cartridge heaters and temperature controls. We strive to only manufacture quality products.
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United Electric Controls Co.
Watertown, MA
617-926-1000
UE, est. 1931, is the leader in pressure & temperature Threshold Detection and Switching™ technology for rugged, industrial environments. Design & engineering expertise ensures the right product each time. Extensive line of standard thermocouples, RTDs, thermistors & temperature sensitive ICs. Custom packages are routine too. ISO 9001:2000 certified with a continued emphasis on quality & service.
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ARi Industries, Inc.
Addison, IL
800-237-6725
Founded in 1952, ARi Industries is a premier supplier of high-quality thermocouple assemblies, custom thermocouples, temperature sensors and temperature controllers. We supply all our standard AerOpak® thermocouple cables with high-purity MgO insulation. To benefit our customers we are constantly exploring new technologies for heater thermodynamics and fabrication techniques.
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Temperature Controls

Temperature controls are safety devices that prevent gas leaks, explosions, fires and overheating, all of which can cause serious damage and health hazards. Gas water heaters, diesel fuel engines, heating systems and furnaces for residential, industrial and commercial buildings all employ temperature controls, specifically thermocouples, to monitor, measure and control temperature levels in these systems. The oil and gas, petrochemical, water heating, pharmaceutical, food, brewing, power generation and metal fabrication (mainly iron and steel) industries all use thermocouples that are attached to a temperature reading device as temperature control systems. They are simple in composition, long lasting, reliable and require little maintenance. Thermocouples are typically made of two wires of dissimilar metal alloys that are joined together by welding at one end, which acts as the sensor, and attached to a measuring device at the other end. For insulation and protection, these wires are enclosed in a metal casing, often made of copper.

Thermocouples are also designed to act as the heat sensors in temperature control systems, and are accurate, fast and use electrical voltage to determine the temperature of a liquid or gas. Their welded wire tip that acts as the sensor is placed directly in the area to be measured. The heat generates an electric current, which is carried by the wires to the measuring device on the other end. The voltage power change is directly proportional to the temperature of the liquid or gas. The temperature difference from the opposite ends of the wires is then deduced from a measurement of the difference in thermoelectric potentials developed along the wires. Other temperature controls include simple thermometers, resistance temperature detectors and thermistors. The latter two use the principles of different metals' electric resistance, which also varies with temperature. These are equally as accurate, but have a limited temperature measurement capability. All temperature controls are equipped with either a digital front panel, which is fast and simple, or a analog components like knobs, switches or meters.