This chapter elucidates the working principle of the different sensor prototypes that have been explained in the subsequent chapters. The electrodes of all the sensors were shaped in an interdigitated manner, working on the capacitive principle. Due to the flexible and interdigital nature of the sensors, the developed prototypes displayed dual nature of functionality. They were operated as electrochemical sensors with different solutions and as strain strains as a result of a change in dimensions with induced pressure. The sensors were conjugated with electrochemical impedance spectroscopy to determine the changes in impedance values with respect to different inputs provided as per specific applications.