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Thread: How accurate are pool store LaMotte device with UDVs

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    How accurate are pool store LaMotte device with UDVs

    Hello folks,

    Had two water samples at the local pool store over the weekend. They used something that looks like a LaMotte WaterLink with the little UDVs.

    How accurate are these devices?

    If your chlorine or pH is out of whack does that affect the results?

    I've got a Taylor kit on order - will I get better results with a drop kit?

    Thanks to all helpers for your advice!
    Intex 13' X 39" AGP, ~2800 gal filled, with Intex CS8110 SWG and Cu ion (now unplugged), Intex 635T pump/timer 1500 gph in a shady MD backyard.

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    Join Date
    Aug 2010
    Dallas, TX

    Re: How accurate are pool store LaMotte device with UDVs

    You WILL get better results from a K2006.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

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    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Mint Hill, NC

    Re: How accurate are pool store LaMotte device with UDVs

    One of my local stores uses it. They are sweet folks who run a hardware store (not a chain per say but more than one store). They tested my water for free multiple times and didn't get the same results twice. It appears their FC/CC was wildly inaccurate - not giving the same results when testing the same water 10 mins apart, the CYA was close, the CH was close, the pH was close. The real killer however is that the TA reported as ZERO and then later 20 when it was ? (did not have a test kit then) and 170 - 150ppm error!

    I have no idea how accurate over time their results would be, but based on the lack of repeatability I'm not convinced it's worth messing with ever. There's another thread about the ColorQ that's a lower end device for home use - it's got a reputation for accuracy issues as well.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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