What is the B value of NTC thermistor?
Time:2021-04-13
Views:1197
Thermistor is a semiconducting ceramic resistor produced by sintering the materials of Mn,Co, Ni at high temperature and made mainly from metal oxide. NTC thermistor are resistors with large negative temperature coefficient. Change in resistance of the NTC thermistor can be brought about either externally by a change in ambient temperature or internally by self-heating resulting from a current flowing through the device. At certain measure power, its resistance reduces rapidly while the temperature getting increases. Taking advantage of this characteristic, it can achieve the detecting and controlling temperature purpose.
B value is an index of the thermal sensitivity expressed by the formula:
The B value, unless otherwise specified, is calculated using the zero-power resistance when 25℃ and 50℃ in environment temperature.
Normally, B constant value ranges B25°C/85°C= 2,000 - 6,000K. The higher the B value means the larger change rate of resistance along with per 1°C.
Exsense Sensor Technology Co., Ltd. is a manufacturer specializing in the production of various NTC thermistors and NTC temperature sensors. The products produced by Exsense have outstanding advantages such as high precision, high reliability and high stability. Products are widely used in industrial electronic equipment, communications, electricity, transportation, medical equipment, automotive electronics, household appliances, testing equipment, power supply equipment and other fields.
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