Indicator strip pH (pH 5 - 10)
In order to measure the pH-value of a liquid, you can use these strips of litmus paper (indicator paper). The well-known litmus test! As the discoloration more to Red is the liquid is also more acid, if the discoloration more to Bleu is going to luke warm, the fluid is more Base. Indication of pH 1 to 14. Testing saliva, urine, drinking water, aquarium etc. Direct result
PH 1-14 Litmus Paper Test Strips