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Good digital ph meter


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My rule is thumb is you know it's good if it's comes with a liquid filled bottle instead of a cap.  All ph meters need to be kept wet in a proper buffer solution to work reliably long term.  These days the chemistry and electronics aren't expensive, but you can't get around haveing to treat them well.


That said I did have 15$ pen that worked okay in the short run but it broke pretty fast.

Edited by CT_
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