Surface State Model for Conductance Responses During Thermal-Modulation of SnO$_{2}$-Based Thick Film Sensors: Part II—Experimental Verification

This paper and its companion (Part I) are devoted to the development and to the experimental verification of three simple gray-box models able to predict the behavior of some commercial thick film SnO₂-based sensors in presence of oxygen and a reducing gas (CO). In this paper the models developed in Part I are applied to different commercial tin oxide sensors, and experimental results are discussed in order to gain a deeper insight into the sensor behavior

I. Introduction

In THE previous paper (Part I) three models were developed for thick film large grained tin oxide sensors, which allow for conductance prediction during thermal transients in an environment containing oxygen and a reducing gas. All the proposed models are based on the assumption that the sensor dynamics during experiments depends mainly on the ionization of oxygen adsorbed at the grain surfaces.