PH Indicator Strips PH 2.5 - 4.5
PH Indicator Strips PH 2.5 - 4.5, 100 Strips per pack
Johnson Test Papers pH indicator strips pH 4.0 - 7.5 available in 100 strips per pack. For use in solutions to give a pH reading.
Dip the strip into the solution you are testing for around 1-2 seconds and remove. The strip will then change colour, you should compare this colour against the pack's colour chart in order to give a pH reading.
100 Strips per pack