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pH51 Waterproof pH Tester with replaceable electrode
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pH52 Waterproof pH / Temperature Tester with replaceable electrode (0.1 pH resolution)
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pH53 Waterproof pH / Temperature Tester with replaceable electrode (0.01 pH resolution)
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C65 Waterproof Conductivity Tester with replaceable electrode (low range)
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C66 Waterproof Conductivity Tester with replaceable electrode (high range)
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T75 Waterproof TDS Tester with replaceable electrode (low range)
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T76 Waterproof TDS Tester with replaceable electrode (high range)
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