Real-time monitoring of chlorination for effective water quality management
VideoMultiple industries12.12.2024
Chlorine dioxide or free chlorine levels are determined according to the amperometric measuring principle.
The chlorine dioxide (ClO2) contained in the medium diffuses through the sensor membrane and is reduced to chloride ions (Cl-) at the working electrode. At the counter electrode, silver is oxidized to silver chloride.
Electron donation at the working electrode and electron acceptance at the counter electrode causes a current to flow which is proportional to the concentration of chlorine dioxide in the medium. For chlorine dioxide, this process does not depend on the pH value over a wide range. For free chlorine, however, the process depends on the pH value. That's why measurement of free chlorine must always include a pH measurement for compensation.
The amperometric measurement of disinfectants such as bromine and ozone functions in a similar way. Here, bromine and ozone molecules diffuse through the sensor membranes and are reduced.
We offer a complete portfolio for real-time, amperometric measurement of free chlorine, chlorine dioxide, total chlorine, free bromine and ozone. Click here to see all disinfection devices.
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