Influence of Electrodes Polarization on the Response of Resistive Soot Sensor

This study reports on the influence of the polarization applied between platinum electrodes of a resistive soot sensor. The conductance measured between these electrodes represents the sensor response which increases during soot deposition over time at fixed parameters (soot flow, polarization). It is observed that a maximum response is obtained for an optimum polarization. This behavior is explained by equilibrium between the creation and destruction of inter-electrodes soot bridges.