1, whether the temperature of the object to be recorded, alarm and automatic control, the need for remote measurement and transmission;

2, the scope of temperature measurement and accuracy requirements;

3, temperature measuring element size is appropriate;

4, in the case of the temperature of the measured object with time changes, the temperature measurement device can meet the requirements of temperature measurement;

5, the object of the environmental conditions on the temperature measuring element is damaged;

6, such as price protection, the use is convenient.