The filling of water tanks have been done through electrical pumps in the recent. However, untimely turning off the motor pumps lead to less filled tanks or over flown water from the tanks causing wastage. In order to avoid such situations we can have an electronic water level controller which can monitor the water level and switch the motor pump accordingly.
This device has two level indicators which work in harmony of a power switching relay. This relay is the one which connects the water pump to the mains power supply. If the system indicates that water level in the tank is Low, then the system turns on the power supply for the water pump. The pump remains till the system indicates the water level is low. Once the system indicates the water level as high and not low, the power to the water pump is switched off. It remains switched off till the water level is not again to the low level in the tank.
Conductivity of water is what makes the level sensing work. With a reference level at the bottom we attach the rest two of the high and low level sensing wire terminals at their respective positions. At the time when water isn’t the high level the circuit triggers the low level LED and also the relay to turn ON the water pump. Once the water level catches up the high level, the high level indicator is turned ON and the relay is switched to turn OFF the water pump till the next low level trigger.

• Hardware Specifications

• 555 Timer IC

• Water Level Sensor

• Relay

• Resistors

• Capacitors

• Transistors

• Cables and Connectors

• Diodes

• PCB and Breadboards

• LED

• Transformer/Adapter

• Push Buttons

• Switch

Diagram