Potentiostat
Electronic system controlling a three electrode cell / From Wikipedia, the free encyclopedia
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A potentiostat is the electronic hardware required to control a three electrode cell and run most electroanalytical experiments. A Bipotentiostat and polypotentiostat are potentiostats capable of controlling two working electrodes and more than two working electrodes, respectively.[1][2][3][4]
The system functions by maintaining the potential of the working electrode at a constant level with respect to the reference electrode by adjusting the current at an auxiliary electrode. The heart of the different potentiostatic electronic circuits is an operational amplifier (op amp).[5] It consists of an electric circuit which is usually described in terms of simple op amps.