Features: 1.Liquid level status LED display 2.Electronic circuit structure, non-mechanical working mode, stable performance, durable life 3.High stability, high sensitivity, good anti-interference, no external electromagnetic interference, adapt to complex environment 4.Strong compatibility, penetrating various non-metallic materials such as plastic, glass, ceramic and other containers, the sensing distance can be up to 8mm; suitable for the detection of dielectric liquid and powdery small particles such as water, alcohol, acid, alkali, etc. It is suitable for the installation of plastic, glass, ceramic and other non-metallic containers and the outer wall of container pipes, with different mounting brackets, suitable for different occasions. 5.NPN output , suitable for various control circuits, 50mA maximum output current