Material and working principle of temperature sensor:
Material: Temperature sensor thermal resistance is mostly made of pure metal materials, the current application is mostly platinum and copper, in addition, has now begun to use Dian, nickel, manganese and rhodium and other materials to manufacture temperature sensor thermal resistance. Omega's PT100 temperature sensor, for example, contains a 100 ohms platinum resistance temperature probe.
operating principle
The thermal resistance measurement of temperature sensor is based on the property that the resistance value of metal conductor increases with the increase of temperature.
Temperature sensor thermal resistance measurement system is generally composed of temperature sensor thermal resistance, connecting wire and display instrument. The following two points must be noted:
① The thermal resistance of the temperature sensor and the index number of the display instrument must be consistent
In order to eliminate the influence of the resistance change of the connecting wire, the three-wire connection method must be used.