Temperature sensors are mainly used to detect engine temperature, suction gas temperature, cooling water temperature, fuel temperature, and catalytic temperature. There are three main types of temperature sensors: wirewound resistance, thermistor type and thermocouple type. The three types of sensors have their own characteristics, and their applications are slightly different. The wirewound resistance type temperature sensor has high precision, but the response characteristics are poor; the thermistor type temperature sensor has high sensitivity and good response characteristics, but the linearity is poor, and the temperature is low; the thermocouple resistance type temperature sensor has high precision and the measurement temperature. The range is wide, but it needs to be used with the amplifier and cold junction processing.
The products that have been put into practical use are thermistor type temperature sensors (general type -50 ° C ~ 130 ° C, accuracy 1.5%, response time 10 ms; high temperature type 600 ° C ~ 1000 ° C, accuracy 5%, response time 10 ms), ferrite type Temperature sensor (ON/OFF type, -40 ° C ~ 120 ° C, accuracy 2.0%), metal or semiconductor film air temperature sensor (-40 ° C ~ 150 ° C, accuracy 2.0%, 5%, response time 20ms).