The pH value indicates whether a water reacts acidic, alkaline or neutral.
It is determined by the concentration of hydrogen ions. All biological processes in water are tied to
specific pH ranges. For municipal and industrial applications, too, the control of specific pH limits
is important since e. g. the efficiency of sewage plants or the corrosive action of tap water on the
pipes depend in the pH value. Contrary to pH indicator papers VISOCOLOR®
pH test kits can also be used to determine accurate pH values in unbuffered sample solutions.