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Hanna Instruments HI98103 Checker pH Tester with Ph Electrode and Batteries, 0.00 to 14.00 pH, +/-0.2 pH Accuracy, 0.1 pH Resolution: Lab Electrodes: Amazon.com: Industrial & Scientific
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BNGXR PH Testeur Electronique,Testeur de qualité de l'eau Digital LCD,Fonction D'étalonnage Automatique et 0.00-14.00 PH Numérique Mètre Testeur de Ph Avec L'auto-calibrage Pour L'Eau Potable Piscines : Amazon.fr: Commerce, Industrie et Science
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2-in-1 Combo pH & Temperature Meter Water Quality Tester Replaceable BNC pH Electrode for Aquariums Hydroponics Tanks Aquaculture Laboratory: Amazon.com: Industrial & Scientific
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Apera Instruments Value Series PH850-DP Portable pH Meter Kit for Dairy Products and Liquid Food: Amazon.com: Industrial & Scientific
PH Meter Automatic Calibration Mini Water Quality Tester with a Range of 0.0 to 14.0 PH for Outdoor Use to Test pH Balance of Drinking Water : Amazon .de: Business, Industry & Science
Amazon.com: American Marine PINPOINT pH Monitor + Calibration Fluids : Pet Supplies
