Water Quality Tester PH Meter TDS Meter Tester LCD Digital Pen Tester Water Quality Purity Tester PEN

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1

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0

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1

-9%

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0

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Incomplete data

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-6%

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1

5.0

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1

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3.5

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4.0

-6%

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-16%

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-3%

Incomplete data

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0

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-2%

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5.0

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1

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-5%

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-12%

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-7%

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1

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1

5.0

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1

5.0

-0.1%

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0

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-6%

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8

4.8

-30%

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1

-5%

Incomplete data

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1

-0.4%

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5.0

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-0.1%

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-6%

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-4%

Incomplete data

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-0.9%

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4

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-29%

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6

5.0

-0.1%

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1

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1

Incomplete data

Water purity filter measuring tools temp/ppm portable ph tds meter tester 0-9999 ppm water meter quality testing pen

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0