I bought this primarily for a ph meter but it only lasted a few days before it stopped working. I have tested this meter with another meter and pH solution, pH 7.5 water, but this meter keeps showing the pH moving up and down, there is no end result because it keeps changing , but it shows a pH of 3.0 to 4.0 on water, as far as I know it's 7.5! Gave me serious problems thinking the pH was much lower than it actually was until I tested it.
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