Thermocouples/

Temperature Sensors

Temperature sensors are used to identify or read the temperatures of materials or substances and supply this information to a control system, or visual output system. An observer is then able to make adjustments accordingly. Temperature sensors are an important component of applications in industries such as food and beverage processing, petrochemical, cosmetics, pharmaceutical and other scientific and engineering processes.

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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 sensors you need. Your solution is just a phone call away.
 
Thermal Devices
Mt. Airy, MD
800-282-9100
Thermal Devices specializes in the sale and application of temperature sensors 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!
 
Temperature Specialists, Inc.
St. Francis, MN
800-272-5709
You can't find a better place for temperature sensors 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!
 
Chromalox
Pittsburgh, PA
800-443-2640
Customers have relied on Chromalox for the utmost in quality and innovative solutions for industrial heating applications for almost a century. Chromalox manufactures the world's largest and broadest line of temperature sensors, including heating components, immersion heaters, circulation systems, heat transfer systems, boilers, industrial and comfort air heating and heat trace cables.
 
Watlow Electric Manufacturing Company
St. Louis, MO
800-492-8569
Watlow is the largest custom designer and manufacturer of industrial temperature sensors, with offices and manufacturing facilities around the world. Watlow brings its thermal expertise to numerous applications, including photovoltaic, semiconductor, analytical instrumentation, medical equipment, plastics processing, food service equipment, packaging, aerospace and others.
 
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Industry Information

Temperature Sensors

Temperature sensors are able to prevent engines and equipment from overheating as well as preserving the characteristics of substances that change according to heating or cooling. Using both contact and non-contact means of information gathering, temperature sensors or heat sensors are sensitive to changes in the state of a material or substance. Contact temperature sensors are used with solids, liquids or gases and use physical contact to determine the temperature of an object or material. Contact sensors are simple to use and relatively accurate. They have a wide application range but run the risk of contaminating a substance or process. Non-contact sensors or temperature probes use infrared energy emissions to determine the temperature or temperature change of a material or substance. Unable to be used for gas applications, non-contact sensors are however ideal for objects in motion and are able to provide a quick temperature reading.

The sensors determine temperature by sensing physical characteristics such as thermal or infrared radiation, substance resistance or electromagnetic readings. Examples of temperature sensors include devices such as thermocouples, resistance temperature detectors and thermistors. Thermocouples are suitable for heavy-duty environments as they are able to withstand extreme environments and high temperatures. They are also a relatively cheap component of a processing system. Resistance temperature detectors (RTDs) are more expensive but are used in processes where accuracy is essential for process control as they are able to ensure precise measurements. Thermistors on the other hand are especially sensitive to temperature changes as they are typically constructed of semi-conductor materials. They change in electrical resistance when exposed to differing temperatures. When determining the most suitable temperature sensor to install in a system, there are a number of factors to consider. Most importantly, the desired temperature range, reading accuracy and the repeatability of the process are primary choices. Other factors to consider include: probe type, electrical output, sensitivity, response time and cost. For some specific applications, the ruggedness or durability of the temperature sensor may be important. These sensors will have to resist moisture, harsh weather conditions and pollutants or contaminants and so maybe need extra components for protection.