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Thread: water sensor

  1. #1
    MySQL Error scott_fx's Avatar
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    water sensor

    Hey guys,

    I'm toying around with the idea of having a computer controlled ballast system in my boat. I want this to be fully automatic and therefor would need a way to tell the computer when the tanks are full and to stop pumping. I think that tapping into the overflow would be the easiest way to 'sense' when the tanks are full. Basically.. when they tanks fill up, they'll start evacuating the flowing water out of the overflow port. if i could put something there that could sense the water then it could tell fb to shut down the pumps.


    does anyone know of sensor that would fit my needs?
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  2. #2
    Fusion Brain Creator
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    2 contacts and a darlington pair

    ala here:

    http://www.zen22142.zen.co.uk/Circui...waterrelay.htm

  3. #3
    MySQL Error scott_fx's Avatar
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    that is perfect... thanks!
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  4. #4
    MySQL Error scott_fx's Avatar
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    just a thought since i have some of these ic's laying around but, could you also use a qprox capacitance switch to sense water?
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  5. #5
    Fusion Brain Creator
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    i guess but a darlington pair is like 20 cents

  6. #6
    MySQL Error scott_fx's Avatar
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    fair enough
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  7. #7
    Fusion Brain Creator
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    yeah, the problem is that you'll encounter some issues with residual moisture being enough to trigger the circuit.

    really you probably want a cheap flowmeter like this, with a LED/phototransistor

    http://cgi.ebay.com/Rate-Meter-Serie...3A1%7C294%3A50

  8. #8
    MySQL Error scott_fx's Avatar
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    i wonder if that would hinder the flow of water though.
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

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