I need to build a sensor to see the water level in a tank that have plants(hidroponics). I don't want to use an Arduino for this sensor project. I just need to flash a led when the wires are not any more in contact with the water. This is possible to do without an Arduino?
I have this cheap sensor in mind:
1 - I will incur in problems with Electrolysis and plants(I know that this is not an electronics question. If you don't know, please ignore this question)
2 - How can I minimize the Electrolysis effect in the wires to not dissolve the wires?