A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors. NTC Thermistors are non-linear resistors, which alter their resistance characteristics with temperature. What are NTC thermistors? thermistor integrated in a stainless steel probe NTC stands for “Negative Temperature Coefficient. Thermistor · With NTC thermistors, resistance decreases as temperature rises. NTC thermistors also are incredibly accurate temperature sensors.