[Lab] Water sensor for an arduino?

[Tom Burns]

If that doesn't work, use two nails and a floating conductive ball to
complete the circuit when the water raises.

On Monday, March 31, 2014, Justin <justin at slootsky.org> wrote:

> With spring comes flooding.
>
> I have a pump, but it doesn't have an auto shutoff, and it shouldn't run
> dry.
>
> I have a powertail that I can use to turn the pump on and off, so now all
> I need is a water sensor.
>
> Would this be as simple as two nails in a board with wires attached to the
> nails? Water is conductive, when the water completes the circuit, the
> Arduino notices and turns on the pump.
>
> Probably two water sensors, with the "on" sensor being above the "off"
> sensor to prevent it from triggering on and off too fast.
>
> Is anything wrong with my logic? Why won't this work? Do I need more than
> wires to make a water level sensor?
>
>
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