Liquid level control system by the control box and the water pump motor, ultrasonic liquid level sensor, a total of three parts，Ultrasonic liquid level sensor as input module. Control box as control module. Water pump motor as an output module. Water level is higher than the set value, the water pump into work state, until the water level is lower than the set value, the pump will stop working. The ultimate goal of the whole control system is level adjustment system status, to prevent the water level is higher than the set value.
