Next Article in Journal
Detection of Illegal Race Walking: A Tool to Assist Coaching and Judging
Next Article in Special Issue
Effect of Embedded Pd Microstructures on the Flat-Band-Voltage Operation of Room Temperature ZnO-Based Liquid Petroleum Gas Sensors
Previous Article in Journal
Comparability of Red/Near-Infrared Reflectance and NDVI Based on the Spectral Response Function between MODIS and 30 Other Satellite Sensors Using Rice Canopy Spectra
Previous Article in Special Issue
Theoretical Calculation of the Gas-Sensing Properties of Pt-Decorated Carbon Nanotubes
Sensors 2013, 13(12), 16051-16064; doi:10.3390/s131216051
Article

NO Detection by Pulsed Polarization of Lambda Probes–Influence of the Reference Atmosphere

1,2
, 1
, 2
, 2
 and 1,*
Received: 30 September 2013; in revised form: 15 November 2013 / Accepted: 15 November 2013 / Published: 26 November 2013
(This article belongs to the Special Issue Gas Sensors - 2013)
View Full-Text   |   Download PDF [808 KB, updated 21 June 2014; original version uploaded 21 June 2014]   |   Browse Figures
Abstract: The pulsed polarization measurement technique using conventional thimble type lambda probes is suitable for low ppm NOx detection in exhaust gas applications. To evaluate the underlying sensor mechanism, the unknown influence of the reference atmosphere on the NO sensing behavior is investigated in this study. Besides answering questions with respect to the underlying principle, this investigation can resolve the main question of whether a simplified sensor element without reference may be also suitable for NO sensing using the pulsed polarization measurement technique. With an adequate sensor setup, the reference atmosphere of the thimble type lambda probe is changed completely after a certain diffusion time. Thus, the sensor response regarding NO is compared with and without different gas atmospheres on both electrodes. It is shown that there is still a very good NO sensitivity even without reference air, although the NO response is reduced due to non-existing overlying mixed potential type voltage, which is otherwise caused by different atmospheres on both electrodes. Considering these results, we see an opportunity to simplify the standard NOx sensor design by omitting the reference electrode.
Keywords: lambda probe; UEGO; NO sensor; NOx sensor; mixed potential; YSZ; pulsed polarization; reference atmosphere lambda probe; UEGO; NO sensor; NOx sensor; mixed potential; YSZ; pulsed polarization; reference atmosphere
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Fischer, S.; Schönauer-Kamin, D.; Pohle, R.; Fleischer, M.; Moos, R. NO Detection by Pulsed Polarization of Lambda Probes–Influence of the Reference Atmosphere. Sensors 2013, 13, 16051-16064.

AMA Style

Fischer S, Schönauer-Kamin D, Pohle R, Fleischer M, Moos R. NO Detection by Pulsed Polarization of Lambda Probes–Influence of the Reference Atmosphere. Sensors. 2013; 13(12):16051-16064.

Chicago/Turabian Style

Fischer, Sabine; Schönauer-Kamin, Daniela; Pohle, Roland; Fleischer, Maximilian; Moos, Ralf. 2013. "NO Detection by Pulsed Polarization of Lambda Probes–Influence of the Reference Atmosphere." Sensors 13, no. 12: 16051-16064.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert