What are the temperature sensors?

The temperature sensor is divided into contact temperature sensors and non -contact temperature sensors.

Features of contact temperature sensor:

1. Based on the principle of thermal balance:The temperature measurement element must be in contact with the measurement of the measurement. In a long enough time, the two are in the same thermal balance state and have the same temperature.

2. The advantages of contact temperature sensor:Simple, reliable, high measurement accuracy, and mature technology, large choices.

3. Disadvantages of contact temperature sensor:
a. Since the temperature measurement element needs to be fully exposed to the measured, the thermal exchange can be achieved in order to achieve the thermal balance, and the phenomenon of lag.
b. Due to the limitations of high temperature resistance, contact type temperature measurement cannot be applied to high temperature measurement.

Features of non -contact temperature sensors:

1. Based on the principle of heat radiation:It is to use the heat radiation of the measured object to emit infrared rays to measure the temperature of the object.

2. Advantages of non -contact temperature sensor:
a. Since the temperature measurement component does not contact the measured material, it can judge the temperature by receiving the radiant heat from the measured object, and the high temperature can be measured.
b. The temperature measurement speed is also faster;
c. A measures can be measured.

3. Non -contact temperature sensor disadvantage:
Because it was tested to other media images such as the meter distance, smoke and water vapor, the general temperature measurement error was generally large.