NTC temperature sensor analysis

What is an NTC temperature sensor? What is its function? What valuable technologies should we master? The editor will also improve the related technologies of NTC temperature sensors. The NTC temperature sensor is a thermistor and probe. Its principle is: the resistance value decreases rapidly as the temperature rises. It usually consists of 2 or 3 metal oxides, mixed in a fluid-like clay, and sintered in a high-temperature furnace to form a dense sintered ceramic. Actual sizes are very flexible, they can be as small as .010 inches or very small in diameter. There is almost no limit to the maximum size, but half an inch or less usually applies.

NTC temperature sensor

NTC thermistor and probe assembly. A finished thermistor assembly that is composed of a thermistor shell, extended leads, and sometimes a connector.

structure

Generally composed of NTC thermistor, probe (metal shell or plastic shell, etc.), extension lead, and metal terminal or connector

principle

Using NTC thermistor, under a certain measurement power, the resistance value decreases rapidly as the temperature rises. Utilizing this characteristic, the NTC thermistor can be used to determine the corresponding temperature by measuring its resistance value, thereby achieving the purpose of detecting and controlling temperature.

application

● On air conditioners, refrigerators, freezers, water heaters, water dispensers, heaters, dishwashers, disinfection cabinets, washing machines, dryers and other home appliances.

● Automotive air conditioners, water temperature sensors, intake air temperature sensors, engines

● Switching power supply, UPS uninterruptible power supply, frequency converter, electric boiler, etc.

● Smart toilets, electric blankets, etc.

Features:

● High sensitivity and fast response speed

● Resistance and B values ​​have high precision and good consistency and interchangeability

● Adopting double-layer encapsulation process, it has good insulation and sealing properties and resistance to mechanical collision and bending.

● The structure is simple and flexible, and can be customized according to different design requirements of customers.

Performance introduction of NTC temperature sensor:

NTC temperature sensors are usually composed of 2 or 3 metal oxides, mixed in a fluid-like clay, and sintered into a dense sintered ceramic in a high-temperature furnace. Oxygen-bonded metals tend to donate free electrons. Ceramics are generally excellent insulators. But this is only theoretically the case with thermistor-type ceramics when the temperature is close to absolute zero. However, as the temperature increases to more common ranges, thermal excitations throw out more and more free electrons. As many electrons carry current through the ceramic, the effective resistance decreases. Resistance changes extremely sensitively with temperature. Typical changes are (-)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, and the contact area of ​​the electrodes. A thermistor that is thick and narrow has a relatively high resistance, while a thermistor that is thin and wide has a lower resistance. Actual sizes are also very flexible, they can be as small as .010 inches or very small in diameter. There is almost no limit to the maximum size, but half an inch or less usually applies. The above is some technical knowledge about NTC temperature sensors, I hope it can inspire you.