The resistance value of the thermistor is expressed by KΩ, generally the specific temperature corresponds to the corresponding resistance value, like the mathematical function table, such as the thermistor used in air conditioning or refrigerator at 20 degrees when the resistance value is about 30K, different manufacturers of thermistors will be different, the resistance value is also deviated, some are positive temperature resistance, the temperature rises, the resistance value increases, and some temperature rises. Where the resistance value is reduced (negative temperature resistance) is specifically used, it is necessary to select specifically, such as negative temperature class resistors for refrigeration, and positive temperature thermistors for other stoves (bread stoves) are mostly used. Use the manufacturer's temperature and resistance table for reference.