The XKC-C352 intelligent non-contact liquid level controller from Shenzhen XingKeChuang Technology Co., Ltd. uses the low-level liquid level sensor to send a low-level alarm signal, which triggers the C352 controller to close the relay to start the water pump to add liquid level, and the high-level liquid level sensor sends a signal when the liquid level reaches a certain height. The C352 controller disconnects the relay and automatically stops the water pump to work, thereby realizing the automatic control of the container liquid level and keeping the container liquid level stable.