Product Description

Most water level indicators are equipped to indicate and detect only a single level. The Numeric Water Level Indicator implemented here can indicate up to nine such levels and displays the level no. on a seven segment display. Hence, not only is the circuit capable of cautioning a person that the water tank has been filled up to a particular level, it can also indicate that the water level has fallen below the minimum level. This is particularly important in appliances such as the desert cooler where there is a danger of motor-burnout when the water is used up. This circuit exploits the simple fact that water is a good conductor of electricity. The placement of nine probes (having connections to the circuit) at different heights inside the water tank determines the nine different detectable levels. When the water reaches a particular height in the tank; the seven segment display shows the corresponding level no., digit 9 representing the “tank full” condition and digit 0 representing the “tank empty” condition.