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The drinking water crisis in Africa is reaching alarming proportions nowadays. Hence, it is of the utmost importance to preserve water for animals and human beings. In many houses, there is unnecessary wastage of water due to the overflow of overhead tanks. An automatic water level indicator and controller can provide a solution to such problems. The operation of the water level controller works upon the fact that water conducts electricity due to the presence of minerals within it. So, water can be used to open or close a circuit. As the water level rises or falls, different circuits in the controller send different signals. These signals are used to switch ON or switch OFF the motor pump as per our requirements. The total amount of water available on Earth has been estimated at 2 billion cubic kilometers, enough to cover the planet with a layer of about 3 km. About 95% of the Earth's water is in the oceans, which is unfit for human consumption and usage. About 4% is locked in the polar ice caps, and the rest 1% constitutes all the fresh water found in rivers, streams, and lakes that is suitable for our consumption. |
