diy overflowless sump/tank level controller

Discussion in 'Anything DIY Related' started by brettb2020, 24 Feb 2009.

  1. brettb2020

    brettb2020

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    so this is my setup. i wanted to add a scrubber in the tanks cabinet but: cant drill the tank as its tempered, cant put an overflow box because of the hood. the hood has a filter inside which only has some carbon in since i got an external filter.

    so i decided to syphon off from there and build a control box that monitors the water levels of the tank and the scrubbers sump and control the pumps. in the same breat i decided to add a auto top off unit since its the same circuit:)


    1609498dae10d091d.jpg

    thats the control box, very messy but i dont have space for a bigger box in my cabinet.

    this control box uses stainless steel probes to detect the waters presence. the probes have a very small voltage across them (a few milli volts) and since water is slightly conductive, a tiny bit of current flows between the probes which is amplified and switches a relay. the current is a few micro amps so it wont turn your tank into an electrolysis plant:)

    160949945ead92cfd.jpg

    the full setup

    160949945e964fa3c.jpg
     
    Last edited: 24 Feb 2009
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  3. Punk

    Punk

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    damn that's some awesome clever DIY you did there dude!!! :peroni:

    just wish i understood how it all worked :p
     
  4. Shaun

    Shaun Retired Moderator

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    From my experience the stainless steel does not last long in a marine tank, and I am not talking about the low grade stuff that guys call stainless steel.
     
  5. OP
    brettb2020

    brettb2020

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    ive heard that to shaun. i got the highest grade quility, 316l grade stainless. il see how it goes. i dont see anything making that rust though. :)
     

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