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The pH value of aqueous products is of vital importance for the product properties and durability. This part of DIN 55659 (DIN 55659-2) specifies a method for measurement of the pH value of dispersions and coating materials with pH electrodes with ISFET technology (ion-sensitive field effect transistor). The committee responsible for this standard is NA 002-00-07-12 AK "Leitfähigkeit und pH-Wert" ("Electrical conductivity and pH value") at DIN.
This document has been replaced by: DIN EN ISO 19396-2:2020-05 .