YIERYI PH Meter pH Test Strips Indicator Test Strips 1-14 Paper Litmus Tester

PH Meters PH Test Strips Indicator Test Strips 1-14 Paper Litmus Tester/Brand New Measurement & Analysis Instrumen.

Specification:
1-3 indicates a very acidic substance
4-6 indicates an acidic substance
7 shows a neutral
8-11 indicates alkalinity
12-14 indicates a very high level of alkalinity
Paper size: 45 mm x app 7 mm (L x W)

Instructions:
Simply press the test strip on the test object or liquid. Half a second later, remove the paper and use the included color chart, compare the change in color of the paper to determine the level of acidity.
Can not be said acid or alkali, when its density was lower than 0.01%.
Store in a dry place for the rest of paper.

Package list:
1 * ph test stri