Water Tank Level Indicators are used to measure and regulate the water level in a water tank. When the water level drops too low, the control panel can be configured to automatically turn on a water pump and refill the tank. These indicators are widely used in households, hospitals, and factories. Water Tank Level Indicators can be utilized in both underground and above-ground tanks. They save water, power, and time when used. Assists in preventing water from the above tank from overflowing. All of the products we have on sale are great and have been well tested.