The detection part of the contact temperature sensor has good contact with the tested object, also known as thermometer.
Thermometers achieve heat balance by conduction or convection, so that the value of the thermometer can directly represent the temperature of the object under test.
Generally, the measurement accuracy is higher. A thermometer can also measure the temperature distribution inside an object within a certain temperature range. However, for the moving body, small target or object with small heat capacity, there will be a large measurement error. The commonly used thermometers include bimetal thermometer, glass liquid thermometer, pressure thermometer, resistance thermometer, thermistor and thermocouple.
