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Waterproof pH Tester with ±0.1 pH Accuracy
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日期：2025-07-09
Q. I recently purchased the Hanna pH meter and am trying to use it (first time) and it will not calibrate and it will not read any measurement below 7.0. I have tried to calibrate following the directions and the 1 point will calibrate but will not read a...看更多
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