Journal of Sensors and Sensor Systems
Journal of Sensors and Sensor Systems
JSSS
Articles | Volume 10, issue 1
Articles | Volume 10, issue 1
https://doi.org/10.5194/jsss-10-5-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-10-5-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 10, issue 1
Regular research article
 | 
27 Jan 2021
Regular research article |  | 27 Jan 2021

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3ω method

Ralf E. Bernhardsgrütter, Christoph J. Hepp, Martin Jägle, Hans-Fridtjof Pernau, Katrin Schmitt, and Jürgen Wöllenstein

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Latest update: 27 Oct 2025
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Short summary
The selective catalytic reduction, an after-treatment method using diesel exhaust fluid (AdBlue), is needed to reduce the emissions of diesel combustion processes. It is crucial to monitor the diesel exhaust fluid. This article presents a platinum thin-film sensor using the 3-omega method to characterize the diesel exhaust fluid. The information about the concentration of urea in water can be extracted. The results show that this sensor can determine the urea content to within 1 % by weight.
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Sensors and Measurement Science International SMSI 2020