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Digital Pocket Pen Type PH meter for water purity testing with LCD display Package Includes: 1x PH Meter, 1x Screw Driver, 1x Carry Box, Buffer Powder Usages: ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Measuring pH Range: 0.0 - 14.0 pH || Resolution: 0.1 pH || Accuracy: 0...