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Practice report: New chlorine dioxide sensor for monitoring disinfection
Author:Bernd Schoemaker, Head of Laboratory, Wassergewinnung Essen GmbH. Wassergewinnung Essen GmbH (WGE), a subsidiary of Stadtwerke Essen AG and Gelsenwasser AG, operates two drinking water plants with an annual production volume of about 65 million cubic metres. The drinking water is obtained by the costly treatment of surface water. To monitor the water quality, water quality stations containing instruments that measure chlorine dioxide are operated in the pumping works. On the basis of the experience gained in the trial described in this report, one of the old chlorine measuring instruments was replaced by a new HACH LANGE ClO2 sensor. 4 pages