Negative temperature coefficient thermistor, referred as NTC, its resistance decreases with increasing temperature. NTC is mainly made of manganese oxide, cobalt oxide, nickel oxide, copper oxide and alumina, metal material. Depending on the temperature conditions, negative temperature coefficient thermistor can be divided into a low temperature (-60 ~ 300 ℃), intermediate temperature (300 ~ 600 ℃), high temperature (> 600 ℃) three. NTC temperature is increased by 1 ℃, the resistance will be reduced by 1% to 6%, the resistance degree of reduction varies depending on the model. NTC is widely used for temperature compensation and automatic control circuit, temperature control system as refrigerators, air conditioners, greenhouse temperature is often used as the NTC element.
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