Brief Instruction (Product Description)：
Auto Air Conditioner Evaporator NTC Temp Sensor is mainly used for measuring the temperature of evaporator of automobile air conditioner. The resistance value parameters are generally R25℃=1.5K ω, B25/85=3835K (also can be customized according to customer requirements). The probe is aluminum magnesium alloy, and the wire tail can be equipped with corresponding connectors according to customer requirements.
Features：
Comply for RoHS ISO13485 ISO9001 CE standard
Operating temperature range: -40℃~105℃
Easy to install
Good stability
Application：
Automobile air conditioning, evaporator
Advantage:
Not to absorb heat from the measured object; It will not interfere with the temperature field of the measured object; Continuous measurement produces no consumption, fast response, etc.
Function:
Its resistance value decreases with the increase of temperature, and increases with the decrease of temperature. The evaporator temperature sensor is a negative temperature coefficient sensor that senses the temperature and converts it into a usable output signal. Temperature sensors can be divided into contact type and non-contact type according to the measurement method, according to the characteristics of sensor materials and electronic components into thermal resistance and thermocouple two categories. Automobile air conditioning refers to the air conditioning device installed on the car, which can refrigeration, heating, ventilation and air purification of the air in the car, provide comfortable driving environment for the passengers, reduce the fatigue strength of the driver, and improve driving safety.
Its resistance value decreases with the increase of temperature and increases with the decrease of temperature. The evaporator temperature sensor is a negative temperature coefficient sensor. The evaporator temperature sensor is mounted on the evaporator metal fin in the air conditioning assembly. Its function is to detect the temperature of the evaporator surface and input the detection results to the automatic air conditioning control unit. When the temperature of the evaporator is lower than 2 ° C, the air conditioner stops running to prevent the evaporator from frosting and icing. When the evaporator temperature is higher than 5℃, the air conditioning system can be reconnected. It is a protective sensing element of the air conditioning electrical control system.
Operation principle:
1.The working principle of the temperature sensor in evaporator of automobile air conditioning is different because of different types. The specific principles are as follows: The metal expansion principle of the sensor metal will produce a corresponding extension after the environmental temperature changes, so the sensor can transform the signal of this reaction in different ways.
2. Bimetallic sheet is composed of two pieces of metal with different expansion coefficients stuck together. With the change of temperature, the expansion degree of material A is higher than that of another metal, which causes the metal sheet to bend.
3. The curvature of the bend can be converted into an output signal. As the temperature increases, the length of the metal tube (material A) increases, while the length of the non-expanding steel rod (metal B) does not increase, so that the linear expansion of the metal tube can be transmitted due to the change of position.
4. In turn, this linear expansion can be converted into an output signal. When the temperature of the sensor is changed, the volume of the liquid and gas will also change accordingly.
Structure and Dimensions：(unit:mm)
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