The temperature sensor of an electric kettle is a critical safety device, usually located at the bottom of the kettle or near the heating plate. It monitors the water temperature in real time and provides real-time feedback to the control board when the water boils, which can prevent the risk of dry burning or overheating. The commonly used temperature sensor is a thermistor temperature sensor, which is used in conjunction with a temperature control switch. Thermistors transmit signals to the control chip through resistance changes, achieving precise temperature control. When the hot water kettle reaches the temperature monitored by the control program, the internal signal is transmitted to the temperature control switch, which automatically cuts off the power when the water boils. So the temperature sensor not only ensures safe use but also extends the lifespan of the kettle while avoiding energy waste.