DIN 19260 pH measurement - General terms and definitions*, 2012-10-01 Update
DIN 19261 pH measurement - Measuring methods with potentiometric cells - Terms and definitions*, 2016-03-01 Update
DIN 38404-6 German standard methods for the examination of water, waste water and sludge; physical and physico-chemical parameters (group C); determination of the oxidation reduction (redox) potential (C 6)
DIN EN 61010-1 Safety requirements for electrical equipment for measurement, control and laboratory use - Part 1: General requirements (IEC 61010-1:2010 + Cor. :2011); German version EN 61010-1:2010*, 2011-07-01 Update