5 Meter pH Test Strips Acid Test Paper Roll with pH 1–14 Color Chart for Water, Soil, Urine, Saliva, Detergent & Everyday Substance Testing

It is a good product. It is working as expected. When ph level is 6 it won't change color. At ph 7 it will slightly become yellow green. Perfect.

give approx results compared to lab test. but ok to test house water...etc

Design of the product is good, where i can take small pieces of the paper and indicator on the top also hep compare the results.

All is okay but too over priced and small in size. Should not be more than 100 including delivery.

Too tiny for the price paid..yet to know how it works

2 main inaccuracies with this (see attached image for reference) Inaccuracy 1: Color of original untreated strip should match the neutral color 7 on the color chart but it matches color 6 which is slightly alkaline. Does this mean that the original strip is already showing alkaline? That is inaccurate. Inaccuracy 2: When strip is treated with strong acid, its color should match no. 9 or 10 on the color chart but it matches no.7 which is neutral. That is inaccurate.

Works as expected. Found it little pricey and a small instruction sheet is useful which is not provided in the box.

I tested this for Neutral, acidic ( add lemon ), and basic ( add baking soda). The color changes accordingly so i guess the strip is working fine.