The LF80A electronic level switch detects the water level through the built-in electronic probe, and then the chip processes the detected signal. When it is judged that there is water, the chip outputs high level 24V or 5V (PNP type), and when it is judged that there is no water, the chip outputs 0V.
High and low level signals are read by PLC or other control circuits and drive water pumps and other electrical appliances to work.