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for now I would take an average of the 3 as reading. .02 and .08 are not that off i think that is a good range.. lets see what happens when you get the calibration fluid....I also have a NYOS Phosphate test kit to compare against the Hanna H1773 and the H1774. Today readings results. H1717 read 0.00 H1774 read 0.08 NYOS read 0.02 Which one is accurate?


and matches your expectation ?












