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PH-618 Pen-Type Automatic Calibration IP65 Waterproof PH Meter PH-618 with dual function to test water quality meter Cheapest PH meter manufacturer
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Ionix Imported Digital Pen Type PH Meter with Calibration Accessories for Water Testing (Multicolour) - Price History
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AMTAST Portable Pen Type pH Meter for Skin Fruits Surface Flat Pen pH Tester with Temperature Display, No Need Calibration, Range 0.00~14.00, Temperature: 0~60°C: Amazon.com: Industrial & Scientific
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