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Water detection cable

Discussion in 'General Electronics Discussion' started by Cthulhu, Feb 2, 2016.

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  1. Cthulhu

    Cthulhu

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    Feb 2, 2016
    Has anyone ever used a water detection cable? I am trying to unserstand how it works, in order to eventually use it with an Arduino.

    If you google for images of "water detection cable", you will see what I mean. For now, I am trying with the cable from a honeywell water leak alarm. The cable has a telephone connector, making it easy to test with, and so it has 4 wires.

    [​IMG]
    When connected to the alarm, a little bit of water on the cable sets the alarm off. Just like I will want my Arduino to react and do some bit of code when it detects that the cable is wet.

    So I am trying to find out how to get a reading from the cable with a multimetre. I supposed that the wires are 2 pairs, and when the cable is wet it would close those circuits and I should read a resistance. But I test every pair or wires and I just dont't get any reading.

    I searched for more info on how these water detection cables work, but I can't find anything more than "connect the cable into our gadget".

    Also, I am still quite new to notions of electricity in general, but I know enough to make basic circuits.

    Thanks for any help!!
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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