Material requirements for end face thermistor

The end face thermistor element is wound with specially treated wire and tightly attached to the end face of the thermometer. Compared with general axial thermistors, it can more accurately and quickly reflect the actual temperature of the measured end face. It is particularly suitable for temperature measurement of steam turbine thrust bearings, support bearings, and water pipes of double water-cooled generators. It can also be used for temperature measurement of bearings in large general units, fans, air compressors, and other general machinery. Some devices require synchronous rotation of their leads and resistance elements during installation to ensure that the device is not damaged by human error. However, this situation is inevitable during the actual installation process.

Material requirements for thermal resistance:
The temperature measurement principle of a thermistor thermometer is based on the characteristic of the resistance value of a conductor (or semiconductor) changing with temperature, using an instrument to measure the change in resistance value of the thermistor, and thus obtain the temperature value corresponding to the resistance value. The resistor that can be used as a temperature detection element is called a thermistor.
Most conductors or semiconductors have thermoelectric effects - the resistance of a resistor increases or decreases with temperature, but as temperature sensing elements, their materials should meet the following requirements.
① To have the largest and most stable temperature coefficient of resistance possible.
② The resistivity should be high in order to reduce the size of the component and minimize its thermal inertia at the same sensitivity.
③ The resistance value should have a single value function relationship with temperature, preferably a linear relationship.

④ Within the temperature range of resistor usage, its chemical and physical properties are stable, the material reproducibility is good, and the price is as cheap as possible.