Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

L.M. Middelburg, Mohammadamir Ghaderi, David Bilby, J.H. Visser, Kouchi Zhang, R.F. Wolffenbuttel

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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.
Original languageEnglish
Title of host publication 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)
Number of pages5
ISBN (Electronic) 978-1-7281-5635-4
Publication statusPublished - 2020
Event29th IEEE International Symposium on Industrial Electronics - Delft, Netherlands
Duration: 17 Jun 202019 Jun 2020


Conference29th IEEE International Symposium on Industrial Electronics
Abbreviated titleISIE 2020
OtherVirtual/online event due to COVID-19
Internet address

Bibliographical note

Virtual/online event due to COVID-19


  • Particulate matter sensing
  • exhaust gas after-treatment
  • impedance spectroscopy
  • on-board diagnostics
  • resistive soot sensor


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