A Water Tank Level Indicator is an electronic device designed to monitor and display the level of water in a storage tank. It helps users track the amount of water available, preventing overflows and dry runs. The system typically uses sensors (such as float switches or ultrasonic sensors) placed inside the tank to detect water levels at different heights. The detected levels are then shown through LED indicators, LCD displays, or a digital interface. This system is ideal for residential, commercial, and industrial applications to manage water usage efficiently.