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Time : 2015-04-10 09:37Source :analogtechnologies Author : Analog Click :

NTC thermistor is a sensor, which has been widely used in the applications of temperature measure and control. NTC thermistor is small in size, with  fast response speed. However, users need to pay attention to the following points when using NTC thermistor. 1. NTC thermistor can withstand thermal shock of 200℃,but in order not to make thermal diode aging, the rapid changes should be prevented as far as possible for the packaging material is glass.

2. When the current is going through the thermistor, self-heating and temperature difference will be caused, which we need to consider before using.

3. Due to defective insulation and electrostatic induction, false wiring can cause that the current flowing through the thermistor is too large to damage the thermistor. Therefore, ensure there is no overcurrent through the thermistor in wiring mode.  

4. For the system with high precision requirement or without thermistor resistance aging, we should use a high reliability thermal diode after high temperature testing. The circular thermistor that is often used for temperature compensation in a circuit, cannot be used in the system with variable characteristics.

5. In order to prevent heat leakage and temperature errors, we need to use the maintenance pipes, metal pipes or nonmetal pipes.

6. When there are water droplets, dust or ionic compounds surrounding the thermistor, it can lead to decrease of the resistance or measurement error, so the thermistor should be moisture-proof and insulation disposal so as to maintain itself drying.

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