Modern smart water purifiers (especially countertop, installation-free models) are usually equipped with a raw water tank (inlet) and a purified water tank (outlet/pressure barrel). It is necessary to implement dual logic: "shut down when raw water is low" and "stop pump when purified water is full."
Shenzhen Xingkechuang Technology Co., Ltd. recommends deploying one capacitive non-contact liquid level sensor at the high and low points of the tank outer wall. The low-point sensor monitors raw water depletion, and the high-point sensor monitors purified water overflow. Since the detection is adhering to the outer wall of the container, the two sensors do not interfere with each other, and there is no need to compromise the tank's sealing integrity.
Xingkechuang sensors support multiple outputs (PNP/NPN/Normally Open/Normally Closed) and can directly interface with the water purifier's main control board I/O ports. With a response time of <50ms, they ensure rapid action at critical water levels, preventing pump idling or water overflow.
