[Lab] Water sensor for an arduino?

[Justin]

Awesome tips, thanks!


On March 31, 2014 10:26:25 PM Jaime Yu <jaime.yu at gmail.com> wrote:

> Hey,
>
> Sparkfun has some water level sensors which you could check out.
> https://www.sparkfun.com/search/results?term=water+level. It looks like
> their H20hNo! kit does exactly what you suggest so maybe you can gleam some
> hints from their schematics. The distance between the 'nail sensors' will
> have to be awfully close in so the voltage potential is enough so it can
> cross the medium. Water isn't that great of a conductor and will probably
> require some experimentation to get the distance right (ie: salty water is
> much more conductive than distilled).
>
> --
> Sincerely,
> Jaime Yu
> B.Eng in Computer Engineering, System Hardware
> Software Developer III at Juniper Networks
>
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>
>
> On Mon, Mar 31, 2014 at 10:48 PM, Tom Burns <tom.i.burns at gmail.com> wrote:
>
> > 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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