NTC temperature sensor commonly used sensor shape.Stage lens manufacture

　　NTC (Negative Temperature Coefficient) thermistor is a thermally sensitive semiconductor resistor whose resistance value decreases with the increase of temperature. The resistance temperature coefficient is in the range of -2%/k~-6%/k, which is about the value of metal 10 times the temperature coefficient of resistance. The change of the resistance value of the NTC thermistor can be caused by the change of the external ambient temperature, or it can be caused by the current flowing and self-heating. His various uses are based on this property. NTC thermistors are constructed of mixed oxide polycrystalline ceramics. The conduction mechanism of this material is quite complex.

　　The NTC thermistors produced by the company are widely used in various handheld devices and miniaturized electronic devices, and are also widely used in various temperature measurement and temperature compensation occasions. Relying on its technical advantages in the thermistor field, Huaju Electronics produces temperature sensor products with stable performance and reasonable price. The products are widely used in military, medical, human life, industrial automation, automobiles, security and fire protection, home appliances, communications, etc. Fields and occasions that require temperature measurement or overheating protection.

　　NTC temperature sensors typically consist of 2 or 3 metal oxides mixed in a similarly popular clay and calcined in a high temperature furnace to form a dense sintered ceramic. Oxygen-linked metals tend to donate free electrons. Ceramics are generally excellent insulators. But only in theory, when the temperature is close to absolute zero, this is the case with thermistor type ceramics. However, as the temperature increases into the more common range, thermal excitation throws away more and more free electrons. As many electron carriers pass through the ceramic, the effective resistance decreases. Resistance is extremely sensitive to changes in temperature. Typical variation is (-)7[%] to 3[%] reduction per degree Celsius. This is the most sensitive of any sensor suitable for use over a wide temperature range. The rated room temperature resistance depends on the resistivity, size and geometry of the base material, as well as the contact area of the electrodes. Thick and narrow thermistors have relatively high resistance, while thin and wide shapes have lower resistance. Physical size is also very flexible, they can be as small as .010 inches or very small diameters. There is almost no limit to the maximum size, but generally less than half an inch applies.

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