water liquid level sensor relay switch

Posted on Feb 4, 2014

Here is a schematic of a simple water or liquid level sensor relay switch circuit, which can be used to switch on or off electronic appliances at the desired level of water. The circuit is ideal for automatically switch off the water pump when your water tank, pool or aquarium is filled. The circuit is very easy to build and contains only few part

water liquid level sensor relay switch
Click here to download the full size of the above Circuit.

s. The NPN transistor 2N2222 is working as a switch, when the two probes shown in the circuit will detect water the transistor become switch on and activates the six volts relay For operating the circuit with 12 volts use a 12 volt relay.

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