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21 2024-09

　　What are the types of temperature sensors

　　1、 Thermocouple temperature sensor

　　Thermocouple temperature sensors use the thermoelectric potential generated by two different metal parts and temperature changes to measure temperature, which works reliably and stably. Commonly used thermocouples such as K-type, J-type, and E-type are suitable for high-temperature measurement and widely used for industrial furnace temperature control.

　　2、 Resistance temperature sensor

　　Resistance temperature sensors measure temperature by measuring the change in resistance of metal wires or semiconductor materials with temperature. The commonly used ones are PT100 and PT1000, which have a wide temperature measurement range and high accuracy. They are mainly used for measuring and controlling standard temperatures.

　　3、 Thermistor

　　Thermistors use the characteristic of the resistance of specific organic substances changing rapidly with temperature to measure temperature. The main types are PTC and NTC, suitable for a wide temperature range, with sensitive response, and can be used for temperature control and alarm.

　　4、 Semiconductor temperature sensor

　　Semiconductor temperature sensors use the characteristics of bipolar transistors or field-effect transistors that vary with temperature to measure temperature. High precision, small size, mainly used for temperature compensation of precision electronic products.

　　5、 Infrared temperature sensor

　　Infrared temperature sensors use infrared technology to remotely detect the infrared radiation intensity of objects and accurately calculate the temperature value. Easy to use, capable of measuring high temperatures, but greatly affected by external environment, relatively expensive, mainly used for industrial measurement of high temperatures.

　　Summary: Various temperature sensors have different working principles and application ranges. When choosing to use them, the selection should be based on the specific measurement object and accuracy requirements to achieve the best temperature measurement and control effect.