Water Level Indicator
This water level indicator circuit is simple & gives 10 visual indication of the water level in overhead tanks. The circuit requires a good 9 volt regulated power supply or 4 * 1.5 volt torch cells. The lower sensing point is connected by common probe & fitted at desired low level in the water tank. Points marked from 1 to 10 must be fitted in proper serial number at different desired water levels. When the level of the water is below from the lower sensing point all the ten indicators are in off position. When the level of the water reaches over the lower sensing point & point 1 L.E.D. 1 will lit. In this manner when the water level crosses point 2 to point 10, the L.E.D's 2 to 10 shall be lit.
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