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Durable Pen Digital PH Meter 0.01 Accuracy For Aquarium Pool Water

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Yieryi Protable LCD Digital PH Meter Pen electrical PH Tester Aquarium Pool Water Wine Urine

Specifications:

Features:

Packing List:

PH acidity meter calibration powder instructions:

PH pH standard liquid preparation powder, 4.01, 6.86, two specifications,
250ML standard liquid can be prepared for each package. (be sure to change the water according to the required proportion, otherwise it will affect the accuracy of the calibration and make the error increase)

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