A Water Tank Level Controller is an automated system designed to monitor and regulate the water level within a storage tank. It uses sensors to detect the current water level and controls the operation of a water pump to maintain the desired level. When the water level drops below a predefined minimum, the controller automatically switches on the pump to refill the tank. Once the tank reaches the maximum level, the pump is turned off to prevent overflow. This system helps in conserving water, reducing manual intervention, and preventing water wastage or damage caused by overflow.