Device for detecting the water level in an electrical heating appliance

摘要

The device (1) for detecting the water level in a kettle (2) includes a tube (3) with its lower extremity immersed in the liquid. The top extremity of the tube is connected to a pressure sensor (6) which measures the pressure inside the tube. The sensor controls the power supply of the resistor (7) which is placed at the bottom of the kettle. The sensor is connected to the resistor power supply via a relay (8) and is housed in a compartment (9) isolated from the kettle and tube. The lower extremity of the tube is curved and placed under the resistor.