As a manufacturer of measuring systems (transmitter/controllers and sensors) for resistance/conductivity and pH measurement, we are confronted almost every day with the uncertainty prevailing among customers, end users and project planners when it comes to the proper measurement techniques and equipment for high-purity water.
We have written this booklet to provide assistance and information in this field. It is intended to give you a generally understandable background and explanation of the fundamental terminology used in high-purity water measurement, and thus contribute to demystifying the subject. Furthermore, it also presents the procedure that is generally valid (at the time of going to press) for calibrating and testing a high-purity water measuring system, and is currently still firmly based on the American regulations (USP/ASTM).
We are concerned to keep this "Information on high-purity water measurement" up to date, and therefore appeal to the readers for feedback and the sharing of knowledge and experience. Any comments or contributions to the discussion will be most welcome.