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Single Inline TDS meter SM-1
HM Digital

SKU: 200032


  • worth every penny By StevieC on 3/30/14

    TDS meter sm-1 working like it should nice product for the money.
  • does what it needs to do By mrpergo on 3/29/14

    it takes like 5 min to install and does what it is suppose to do.
  • Setup easy and works well By Will on 3/10/14

    Velcro allowed easy attachment to filter system. Quick connect T fit hoses and sensor perfectly. Instructions were well written and clear. Very happy with item.
  • a wise investment By robert98 on 1/16/14

    this product does exactly what it was made to do, easy hook-up perfect for any r/o system.
  • Great convenience but leak problem By Steve D on 7/10/13

    This is a great item to have, but it has a rigid plastic 1/4-inch probe section that fits into the supplied T-fitting. But it has a slow leak between the rigid plastic insert and the quick-lock fitting which caused me to have to put a ball valve in my input water supply just to turn it off between uses so that my otherwise dripless RO system and connectors wouldn't drip, drip, drip day and night.
  • water quality By Billy on 5/30/13

    Never tested my ro system. Since I just bought the upgrade and booster pump from 75 gallon to 150 gallon. I had to get some way to see my water quality. Worth every penny.
  • Excellent! By Loren on 4/22/13

    Hooked it up out of the box, was getting a reading instantly. Great for letting you know when you need to replace your filters, so in a sense saves you money. And keeps your aquarium clean and in tip top shape. I will not go with out one anymore.
  • A needed item if you have a RO/DI system By Rob Coberg on 12/3/12

    I order one of these units a week or so ago, good thing I did . I would have never known my tds were hi as they were. I am taking corrective action to get it to 0 tds where it should be.
  • Must Have By dgil71 on 7/10/12

    Have an RO system? Then you must have one of these. Accurate reading, super easy to install!
  • Works great. Best way to determine if RO/DI system is ok By Tony on 6/5/12

    The Single Inline TDS meter does a great job of detecting TDS in my RO/DI system. I use it once every two weeks to monitor for need for filter change. Easy on/easy off. Great price.
    Thanks!

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