NOTE:
Precision test strips are divided by measurement interval, there are 0.5-5.0, 0.1-1.2, 0.8-2.4, etc.. Beyond the measurement range, the precision PH test paper will be invalid. You can first use the broad test paper to roughly measure the alkalinity of water, and then use the precision test paper for precise measurement.
This paper does not apply to buffer solutions and very weak acid-base solution concentration lower than 0.01%.
Store in a cool, dry place away from sunlight.

Instructions:
1. Take one strip and dip it into the solution you would like to measure. The color of your strip will change immediately.
2. Quickly match this color against the color chart on the inside of package to obtain the pH in 15 seconds. Do not wait or let the strip dry!
3. The number next to the color on the chart is your pH. The pH scale ranges from 1 (very acidic) to 14 (very basic), 7 is neutral.

Description:
Testing Range: 0.5-5.0 Precision
Overall Size: 55x9mm / 2x0.35 inch (L*W)
pH test strips are widely applied to industrial chemical testing, science education, lab use, drinking water, swimming pool, spa, aquarium and classroom analytical chemistry.

Package Content:
1 x pH Test Paper Kit