Today, most houses and buildings in many countries incorporate a water supply as one of their main utilities. When it comes to water, storage tanks are heavily involved, as without them it's impossible to get a 24/7 supply of water in our residences.
However, the water tanks that are installed in our residences have the bad habit of frequently overflowing, causing either some damage to the surrounding materials or simply wasting precious drinking water. In some countries, acquiring fresh water is costly and therefore one can certainly ill-afford wasting them unnecessarily.
A water level controller is a device that directly helps to eliminate this problem. It can be used for automatically sensing and switching ON a water pump when the water level of the tank falls below a certain minimum level, and switch OFF the pump when the level reaches near the brim of the tank, thus inhibiting the tank from over filling and over flowing.
Another important version does not incorporate switching of the pump; rather it provides the user with visual or audio indications regarding the water levels of the tank and thus keeps the user well informed regarding critical situations. Though the units may look complex, making them at home is absolutely easy. The circuit ideas of some useful water level monitoring devices are listed below: