Modelization of interdigitated electrode sensor for impedance spectroscopy measurement

Abstract

In this paper, a new design of a sensor for conductivity measurements is presented. Impedance spectroscopy is often used as experimental techniques to detect and measure changes in electrical conductivity using an equivalent circuit model which is adapted to the electrode geometries used. This theoretical study allows us to determine the geometric factor of an interdigital electrode sensor. While the simulation performed on COMSOL allows us to validate the measurement frequency range as well as the equivalent circuit model which include the double layer capacitance phenomena.