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Thread: Need thermostat control help.

  1. #1
    DIYFK member HillbillyHomer's Avatar


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    Question Need thermostat control help.

    ive had my tank up and running good for a few weeks now and have run into i problem with the new heater. i had the tank running at 75f with the average ambient room temp of 68.
    Two days ago i noticed the temp had crept up to 77 and now its up to 80. ambient temp has not changed.
    i am thinking that if i buy i another new one i will end up with the same problem. So i thinking about getting a digital lcd thermostat regulator similar to this one.

    Now my
    questions.
    is anyone familiar with using these?
    Will it work with a 100w heater?
    Any alternatives?
    Where the hell is my coffee?

  2. #2
    DIYFK member Meep's Avatar


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    It will work as, it's rated at 10A so about 1200W... I use a similar one to keep my chicken water heated in the coop, controlling a titanium aquarium heater, BUT there is one drawback, that temp probe is not the best, I have had one of them burn out on me, the good thing for me is when they burnt out it just stopped heating and didn't boil the water... You can find new temp probes dirt cheap on Ebay so you can stock up, and another thing I though about doing was to by some small pyrex tubing, and slide it over the temp probe then silicone both ends to give it a second layer of water proofing, as I believe the reason it failed is because it leaked...

    If you don't need it in a fancy box, you can get similar bare board versions for less, but the bare board ones generally need a 12v adapter to drive them...

    https://www.ebay.com/itm/DC-12V-Rela...-/401077572526

    I have used that exact one to control temps in a home build incubator... Due, note that particular one I linked is Celsius only so you need to remember to convert...

  3. #3
    DIYFK member HillbillyHomer's Avatar


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  4. #4
    DIYFK member Meep's Avatar


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    Cool, I have a few of those as well that I have used for incubators... Since you rarely get the instructions from Ebay sellers here is the instructions for that module...

    http://www.kelco.rs/katalog/images/17670.pdf

    I also might have to pick up some of those cases, when I got mine about 5 years ago now, they didn't offer any cases...

  5. #5
    DIYFK member HillbillyHomer's Avatar


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    Click here to enlarge...Thanks Meep...Click here to enlarge

  6. #6
    DIYFK member HillbillyHomer's Avatar


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    i found this nice Watts/Amps/Watts calculator.

  7. #7
    DIYFK member HillbillyHomer's Avatar


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    Got them in today but the probe wires are only about a foot long.
    Will one of these work?
    B3 2 m waterproof probe wire 10 K 1% 3950 blac
    temp.jpg

  8. #8
    DIYFK member Meep's Avatar


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    Yes, pretty much all the modules use the same 10K thermistor... Grab a few, because from my experience they will eventually fail...

    Seems like you pay a premium for 2m ones, if 1.5m works you can get a 5 pack for nearly the same price...

    https://www.ebay.com/itm/2x-5x-NTC-1...d/311760404494
    https://www.ebay.com/itm/5-Pcs-1-5m-...e/272477686994

  9. #9
    DIYFK member HillbillyHomer's Avatar


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    Thank you. Click here to enlarge

    P.S.i am pleasantly surprised with the case. i was expecting a cheap flimsy snap over case but it trend out to be a solid little acrylic bugger that you have to put together like a 3D puzzle.

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