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The thermistor resistor is a kind of sensor resistance. The resistance value of the thermistor changes with temperature, which is different from the general fixed resistance. It belongs to a category of variable resistors and is widely used in various electronic components. Unlike resistance thermometers that use pure metals, the materials used in thermistors are usually ceramics or polymers. The two also have different temperature response properties. Resistance thermometers are suitable for a larger temperature range, while thermistors usually achieve higher accuracy in a limited temperature range, usually from -90°C to 130°C.
Thermistor is a sensitive component that has been developed early, with many types and mature development. The thermistor resistor is composed of semiconductor ceramic materials, and the thermistor is made of semiconductor materials, mostly with a negative temperature coefficient, that is, the resistance value decreases as the temperature increases. The main characteristics of thermistor are high sensitivity, wide operating temperature range, small size, easy to use, easy to process into complex shapes and mass production, as well as good stability and strong overload capacity.
Because the semiconductor thermistor resistor has unique properties, it can be used not only as a measuring element, but also as a control element and circuit compensation element in application. Types of thermistors are widely used in various fields such as household appliances, thermistor medical applications，electric power industry, communications, military science, aerospace etc., and their development prospects are extremely broad.