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.

Instructions:

1. Remove one test strip by holding the end of the test strip between your index finger and thumb. Do not touch the test pad with your fingers.
2. Dip the test strip into the solution to be tested so that all three pads are completely immersed.
3. Remove the test strip, and shake off any excess liquid.
4. 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.

NOTE: When comparing to the color chart, the closest match of all three is the correct value. Only one or two of the three pads will change for any given acid, and they will read differently in varying lighting conditions (incandescent, fluorescent, sunlight).