The pH 1-14 test strips are wide-range strips measuring in steps of 1.0 pH units, and give results in just seconds. Use wide range pH 1-14 test strips (acid-base) when you have a diverse range of materials and you are unsure what end of the spectrum you will land on, in order to select which narrow-range strip you should use for final measurement.
Pack of 50 strips in a resealable bag with a waterproof reference chart/instruction sheet.
Instructions:
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Remove one test strip by holding the test strip between your index and thumb finger. Do not touch the test pad with your fingers.
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Immerse the test strip about 1/2″ into the solution to be tested for 1-2 seconds.
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Remove the test strip, and shake off any excess liquid.
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Compare the test pad to the color chart within 30 seconds. Do not allow the test strip to dry before reading against the color chart.