Polarography is an electrochemical method for measuring substance concentrations in a solution. A special measuring cell is required for chlorine measurement. In this process, a fixed voltage is applied between two electrodes to achieve an electrolytic reaction. The reduction current between the two electrodes is proportional to the free chlorine concentration present between the electrodes. The surface of the electrode is polished by ceramic components to ensure stable measurement performance. This enables fast, precise, and maintenance-free measurement without reagents.
However, the polarographic measurement reaches its limits due to the method in case of exceptional pH values and pH value fluctuations. Strong deviations from the neutral pH range can affect the reaction speed and the equilibrium of the electrolytic reaction. In this case, a different measurement method should be chosen.
