Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors
Paper i proceeding, 2020

Impedance spectroscopy in the frequency range 100 Hz to 10 kHz has been applied to the Inter-Digitated Electrode (IDE) structure that is conventionally operated as a resistive sensor for the measurement of Particulate Matter (PM). The measurement of both the in-phase (resistive) and out-of-phase (capacitive) components of the impedance over this frequency range provides more data on PM as compared to DC resistance measurement only. Experimental validation confirms a more gradual change in capacitance with soot buildup as compared to the sudden reduction of resistance with dendrite formation. The effect of an additional vertical electric field for an increased capacitive sensitivity due to stimulated soot buildup has been experimentally investigated using the electrically conductive flow housing of the IDE structure as an additional suspended electrode.

Particulate matter sensing

on-board diagnostics

resistive soot sensor

exhaust gas after-treatment

impedance spectroscopy


Luke M. Middelburg

TU Delft

Mohammadamir Ghaderi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

David Bilby

Ford Motor Company

Jaco H. Visser

Ford Motor Company

Guo Qi Zhang

Reinoud F. Wolffenbuttel

TU Delft

IEEE International Symposium on Industrial Electronics

Vol. 2020-June 1099-1103 9152484

29th IEEE International Symposium on Industrial Electronics, ISIE 2020
Delft, Netherlands,


Medicinsk laboratorie- och mätteknik


Annan elektroteknik och elektronik



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