Help fitting probes inside plastic tank

Discussion in 'Plumbing and Central Heating' started by bowlingo, 17 Mar 2012.

  1. bowlingo

    bowlingo

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    Hi all,

    I am pulling my hair out here..

    I am trying to fit one of these

    http://www.omega.co.uk/ppt/pptsc.asp?ref=CDTX300 (the probe of which is 1/2" bsp thread at the end of the probe and 3/4" BSP thread and the cable side of the probe)

    and one of these

    http://www.omega.co.uk/ppt/pptsc.asp?ref=PHE7151_5312_ORE7151&flag=1 (this probe is 3/4" BSP at both ends)

    I am thinking of passing both the probes into the tank via a 40mm compression gland of which will allow 32mm to pass through it

    http://www.csedistributors.com/acatalog/IP68_Quick-Fit_Nylon_Cable_Glands.html#aEPN250_20_2f_20M40

    The trouble is these compress to between 22mm and 32mm so the cable on the end of the probes (one is 5mm and one is 7mm) wont get gripped by the gland when I have put the probe through and tightened it up...the only way I can see it working is if I put loads of heat shrink round the cables and thicken them up.

    Unless someone has a better idea i.e some sold of gland that has a 32mm opening of which will compress right down.

    Once the probes are in the tank I need some ideas on how I can fix them. I am thinking some T's

    http://shop.allman-sprayers.co.uk/C...lings/Tee-Female-F-F-F/12-BSP-FFF-TEE-024-176

    http://shop.allman-sprayers.co.uk/C...ee-Female-F-F-F/T-PIECE-34-BSP-FEMALE-024-137

    This was the water will flow through them within the tank as it swirls around and the probe tips will screw into the 3rd part of the T

    The trouble here is how do I fix them inside the tank?

    I could possibly use something like this

    http://shop.allman-sprayers.co.uk/C...s-Quick-Relaese-Couplings/Cross-Male---Female

    and a 3/4" one from somewhere then one of these

    http://shop.allman-sprayers.co.uk/C...-Female-Thread/ELBOW-12-FF-90D-THREAD-024-024

    and fix them through the tank using one of these..

    http://shop.allman-sprayers.co.uk/C...ck-Relaese-Couplings/Plug/PLUG-12-BSP-024-031

    I dont want to cut them into the side of the tank as I need to be able pull them out and drop them into calibration solution every few weeks without having to drain the tank down...so if they go through some kind of a gland above the water line and are mounted internally the user can simply unscrew them and pull them back out through the tank.

    Thanks
     
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  3. Agile

    Agile

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    Excuse my curiosity but why do want to know the pH and conductivity of the water?

    Why not just drape the probe over the top of the tank?

    It sounds a bit fishy to me.

    Tony
     
  4. bowlingo

    bowlingo

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    Its for a mobile phone controlled hydroponic system ive been working on for several months...electronics side is no problem its the plumbing, fittings etc that are driving me mad
     
  5. bowlingo

    bowlingo

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    I think the easiest way as far as fixing would be to get some kind of piece of plastic in an L shape and somehow cut a 1/2" bsp thread into it and a 3/4" bsp thread into it and bolt the other side of the L through the tank..sealing with washers etc
     
  6. bowlingo

    bowlingo

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    Or a 1/2" stainless A4 thin nut and a 3/4" stainless A4 thin nut fixes to some kind of L bracket of which will be bolted through the tank
     
  7. libby lou lou

    libby lou lou

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    :LOL: Doing a grow....
     
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  9. bowlingo

    bowlingo

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    building a perfectly legal system...650 hydroponics shops in the UK now
     
  10. bowlingo

    bowlingo

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  11. libby lou lou

    libby lou lou

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    The system is legal. your intentions are not, i don't know about the money you are spending, you've got the right idea but stop advertising it.
     
  12. Agile

    Agile

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    Just been reading all about how the pH is very important when growing cannabis.

    Its all in here:-

    www.sweetleaf.co.uk
     
  13. kevplumb

    kevplumb

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    jeez yer fast :rolleyes:
     
  14. Steve

    Steve

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    :LOL: :LOL: :LOL: :LOL: :LOL: :LOL:
     
  15. DIYnot Local

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    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

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