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Axial-type Glass Sealed NTC Thermistor for Medium High Temperature Detection
2019/11/12 02:11:17


Axial-type glass sealed NTC thermistor is widely used in various fields of temperature detection because of its simple manufacturing process and low cost. At present, the internal structure of most axial-type glass sealed NTC thermistor on the market is formed by direct physical contact between the dumet leads and the NTC chip. If physical contact is poor, which will lead to gaps and the coefficient of thermal expansion of glass and dumet are not the same, it will lead to the possibility of opening circuit at high temperatures. At the same time, most of the axial-type glass sealed NTC thermistor in practical application temperature is -50℃ to 250℃, in the field of medium and low temperature detection can be widely used. However, in the temperature range of 250℃ to 500℃, due to NTC thermistor has the potential possibility of opening circuit, so only metal platinum resistance can be used. But the price of metal platinum resistance is expensive, which will increase cost of production.


In order to overcome the above problems, EXSENSE Electronics introduce a kind of axial-type glass sealed NTC thermistor that can detect medium and high temperature. Its operating temperature range is -50℃ to 500℃, the production process is simple, the cost of production is low. This thermistor is the two metal surfaces of the NTC chip, which come into contact with two dumet leads through conductive silver paste; Then solidifies them in an aerobic environment at 400℃, connecting the conductive silver slurry, NTC chip and dumet lead into a whole and encapsulating them with a glass tube.

Axial-type glass sealed NTC thermistor that can detect medium and high temperature, its dumet leads and NTC chip has been solidified by conductive silver paste; In this way, the possibility of opening circuit due to the gap between dumet lead and NTC chip will be greatly reduced at high temperature. And the area of temperature measurement can be also extended from the existing -50℃~250℃ to -50℃~500℃.


Axial-type glass sealed NTC thermistor produced by EXSENSE Electronic Technology Co., Ltd., has the characteristics of small size, strong structure, high sensitivity, high precision (precision can reach to ±0.3%, ±1%, ±2%, etc.) and so on, which can be used in high temperature, high humidity and other harsh environment. It’s widely used in small household appliances, 3D printer, etc..

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