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Technical Ariticle

High Sensitivity Temperature Sensor

Time:2022-06-28 Views:58

With the development of electronic technology, various electronic circuits are further multi-functional and intelligent, and the application of thermal chips in various occasions that need to detect, control, and compensate for temperature is increasing. At the same time, the structure of NTC temperature sensor is proposed. With higher and higher requirements, in order to achieve high sensitivity and rapid detection, the structural design of NTC temperature sensors must have strong mechanical properties.


Commonly used NTC temperature sensors use ceramic materials combined with glass shells to encapsulate thermal chips to further enhance the mechanical properties of temperature sensors. The problem of electrical performance failure, however, ceramic materials are relatively brittle, easy to crack after being stressed, and the protective effect is not obvious 


Therefore, Exsense provides a high temperature and high sensitivity temperature sensor spliced with glass and silicone, which has the advantages of high mechanical strength, glass shell is not easy to crack, and the response time to temperature is short. It is composed of an NTC thermal chip, two leads, a glass shell and a silicone wrapping layer. It uses a silicone coating layer to improve the mechanical strength of the glass-sealed temperature sensor. The silicone can be closely bonded to the glass shell, and has the properties of shock resistance, insulation, sealing, moisture resistance, and aging resistance. Therefore, its mechanical properties are improved, and the glass shell can be It is well protected and not easy to crack under the action of external force. Moreover, the silicone wrapping layer covers the connection between the lead and the glass bulb, which can improve the problem of cracking at the connection between the glass bulb and the pin caused by pulling or bending the two pins when assembling the temperature sensor. Therefore, the temperature sensing surface can be in close contact with the object to be measured, which increases the contact area between the two, thereby speeding up the response speed of the temperature sensor to temperature during use, which is conducive to improving the sensitivity and accuracy of temperature measurement.

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