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Multiplexed Corrosion Potential is used to track changes in the open-circuit potential of multiple corrosion test cells. The cells are connected to a Gamry Instruments Multiplexer. The user selects from one to eight cells to be measured. Periodically, each selected cell is connected to a Gamry Instruments potentiostat and that cell’s potential is measured. The resulting data usually are plotted as corrosion potential versus time.