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Amazon.com: 2 in 1 Temperature pH Monitor Meter Tester Sensor Test Kit 0~14 pH Automatic Calibration BNC Electrode Probe for Hydroponics Aquarium Lab Testing Food Drinking Water pH of Saltwater/seawater : Industrial
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Apera Instruments PH850-SL Portable pH Meter for Measuring Soils (Direct Measurement) Equipped with LabSen 553 Electrode (pH Range: 0 to 14.00) : Amazon.de: Business, Industry & Science
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Amazon.com: 2 in 1 Temperature pH Monitor Meter Tester Sensor Test Kit 0~14 pH Automatic Calibration BNC Electrode Probe for Hydroponics Aquarium Lab Testing Food Drinking Water pH of Saltwater/seawater : Industrial
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