The pH 1-14 test strips (3-pad) are wide-range strips measuring in steps of 1.0 pH units, and giving 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 not sure what end of the spectrum you will land on. This strip has three pads for accuracy and can be used in many different circumstances, including education, industry, cosmetics, water testing and more. Please see notes below regarding how to read the results of a 3-pad test strip.