NTC (negative temperature coefficient) thermistor is a heat-sensitive semiconductor resistor whose resistance value decreases with the increase of temperature, and the temperature coefficient of resistance is in the range of -2%/k~-6%/k, which is about 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 environment temperature, or it can be caused by the current flowing and self-heating. His various uses are based on this characteristic. NTC thermistors consist of polycrystalline ceramics of mixed oxides. The conduction mechanism of this material is quite complex.
NTC temperature sensors are usually composed of 2 or 3 metal oxides, mixed in similar popular clay, and calcined into dense sintered ceramics in a high-temperature furnace. Oxygen-bonded metals tend to donate free electrons. Ceramics are generally excellent insulators. But only theoretically, this is the case for thermistor-type ceramics when the temperature approaches absolute zero. However, as the temperature increases to more common ranges, thermal excitations eject more and more free electrons. As more electrons carry current through the ceramic, the effective resistance decreases. Resistance changes very sensitively with temperature.
The Structure of NTC Home Appliance Temperature Sensor For Heater Freezer And Ice Maker
Generally, it is composed of NTC thermistor, probe (metal shell or plastic shell, etc.), extension lead, and metal terminal or connector.
The Working Principle of Ntc Home Appliance Temperature Sensor For Heater Freezer And Ice Maker
Using NTC thermistor under a certain measurement power, the resistance value drops rapidly as the temperature rises. Utilizing this feature, the NTC thermistor can be used to determine the corresponding temperature by measuring its resistance value, so as to achieve the purpose of detecting and controlling the temperature.
The Applications of NTC Home Appliance Temperature Sensor For Heater Freezer And Ice Maker
- Air conditioners, refrigerators, freezers, water heaters, water dispensers, heaters, dishwashers, disinfection cabinets, washing machines, dryers and other home appliances.
- Automotive air conditioner, water temperature sensor, intake air temperature sensor, engine
- Switching power supply, UPS uninterruptible power supply, frequency converter, electric boiler, etc.
- Smart toilet, electric blanket, etc.
The Features of NTC Home Appliances
High sensitivity, fast response
- Resistance value and B value have high precision, good consistency and interchangeability
- Using double-layer encapsulation technology, it has good insulation and sealing performance, mechanical impact resistance and bending resistance
- The structure is simple and flexible, and can be customized according to different design requirements of customers.
