PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Yellow) Cooking Ranges - Warning: Not suitable for

- Warning: Not suitable for children under 3 years

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PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Yellow) Cooking Ranges - Warning: Not suitable forOur products come with calibration powder to verify their accuracy. The instructions on the package indicate that when calibrating the powder step, Distilled water should be added when using the calibration powder. It's just because the calibration powder needs to be mixed with distilled water Mini SizeThe mini size ph meter we designed allows you to easily put it in your pocket, so you can take measurements anytime, anywhere. It can help you test it