**3.2 Types of sensors on the basis of mode of transduction**

i.**Amperometric Sensors:** The working of amperometric sensor is based on measuring current generated because of an electrochemical reaction at the electrode surface when a constant working potential is applied with respect to the reference electrode [31]. The amperometric set-up may consist of either two-electrode (WE and RE) or three-electrode (WE, RE, and CE) assembly.

*An Overview of the Synergy of Electrochemistry and Nanotechnology for Advancements… DOI: http://dx.doi.org/10.5772/intechopen.106151*

