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7Pros pH Meter for Water | pH Tester Digital with Built-in ATC and Backlight, 0.01 Resolution, Manual Calibration High Accuracy Water Quality Gauge, 0-14pH Measurement Range, Calibration Packets

PH Meter with Automatic Calibration, 7Pros High Accuracy Pen Type Water Quality Tester, 6 pH Buffer Powder Packets, Best Tool for Testing PH of Fish Tank, Pool, Pond, Kombucha, Wine and Drinking Water

pH Meter For Water, 7Pros Premium pH Tester Digital, 0.01 Resolution High Accuracy Water Quality Tester with built-in ATC, LCD Screen, 0-14pH Measurement Range, Hold Function, 6 pH Calibration Packets

PH Calibration Buffer Solution Powder Set, for Precise pH Meter Calibration, Make 250 ml of Each 4.00pH, 6.86pH, and 9.18pH to calibrate your PH tester (5, pH 4.00, pH 6.86 & pH 9.18 pH)

7Pros TDS Meter | Digital Test Pen, 3-in-1 Water Quality Tester (TDS, EC & Temp) | High Accuracy | Pocket Size Testing Tool For Hydroponics, Ro System, Pool, Aquarium, Spa and Saltwater Tanks

7Pros 3 in 1 Soil Tester Moisture Meter, Light and PH acidity Tester, Plant Care Tester for Garden, Farm, Lawn, Indoor & Outdoor (No Battery needed) Easy Read Indicator