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Apera Instruments SX620 pH Pen Tester Kit ±0.01 Accuracy, ATC, Auto Calibration agriculture test kit Featuring Berkey's exclusive Ionic Adsorption pH electrode maintenance Featuring Berkey's exclusive Ionic Adsorption Micro Filtration Technology This high resolution is essential for applications requiring tight pH control reliable pH pen tester for professionals who demand accuracy Experience the confidence of professional water analysis — anywhere
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