In electrochemical experiments the electrodes are the pieces of equipment that comes in immediate contact with the analyte. For this reason, the electrodes are very important for determining the experimental result. The electrode surface may or may not catalyze chemical reactions. The size of the electrodes affects the magnitude of the currents passed which can affect signal to noise. But electrodes are not the only limiting factor for electrochemical experiments, the potentiostat also has a limited range of operation. The role of potentiostat in research was explained with its different application. The different types of analysis can be performed from the instrument. The Gamry reference 3000 instruments have many benefits as compared to other potentiostat, in way of analysis and applications. The instrument can be used for CV, DPV, SWV and many more applications. The significant feature of the instrument was also explained with their trouble shooting issue and their solutions.