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Thread: an electronic way to test my water hardness using sodium instead of salt

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    DIY Member jasper7821's Avatar
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    Default an electronic way to test my water hardness using potassium instead of salt

    I was looking for a hardness tester and across a Hanna Instruments HI98202
    and looking at the manual and it says it tests hardness by
    the pNa tester utilizes a sodium ion-selective
    electrode to determine the activity of free sodium
    in solution.

    Since it determines the activity of free sodium in a solution does using potassium still make the tester give the same reading as using salt ?
    Last edited by jasper7821; 10-08-2012 at 12:51 PM.

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