NTC temperature sensor's performance medium.Smart Human Body Infrared Sensor

　　NTC temperature sensors are usually composed of 2 or 3 metal oxides, mixed in clay -like clay -like clay, and forged a dense sintering ceramics in high -temperature furnaces. Oxygen -connected metals often provide free electronics. Ceramics are usually excellent insulators. But only in theory, this is the case when the temperature is close to absolute zero degrees. However, when the temperature increases to a more common range, thermal inspiration will throw out more and more free electronics. As many electronic load flows through ceramics, the effective resistance value is reduced. The resistance changes with the temperature. Typical changes are decreased per degree Celsius (-) 7 [%] to 3 [%]. At this time, any sensor used in the wide temperature range is the most sensitive.

　　The temperature resistance of the rated room depends on the resistivity, size and geometric shape of the basic material, and the contact area of the electrode. The thick and narrow thermistor has a relatively high resistance, while the shape is thin and wide and has a lower resistance. The actual size is also very flexible, and they can be small to the diameter of .010 inches or small. The maximum size is almost limited, but it is usually applicable to less than half an inch.

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