Integrators:

Most of the modern apparatus for potentiostatic coulometry employ integrators to determine the number of coulombs needed to whole electrolysis.

Efficient stirring is significant for controlled potential electrolysis, because all analyte species must be swept up to the electrode surface, so in which the electrochemical reaction is done. Besides stirring, the ratio of the electrode surface to solution volume is other needs of the experiment. This ratio plays a role in determining the time required for done electrolysis, because the electrical current will be straightly proportional to electrode area, A and also straight proportional to the concentration, c, of the analyte.