กระดาษวัดความเป็นกรด-ด่าง pH 0-14 Merck 100 Test/กล่อง

General description Non-bleeding pH color strips. Simply immerse the strip in the test solution until color development is complete. Then compare the developed color to the sequence chart on the package, and read the pH. The range covered by each type of strip is divided into graduations as given below. Each package contains 100 strips in a clear, plastic container with a snug fitting top. 0-14, resolution: 1.0 pH unit