B5.2 Simultaneous Quality and Flow Rate Monitoring of Diesel Exhaust Fluid by Using A Platinum Thin Film Sensor
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Sensors and Instrumentation
- B5 Chemosensor Applications
- R. Bernhardsgrütter, C. Hepp - Innovative Sensor Technology IST AG, Ebnat-Kappel (Switzerland), J. Wöllenstein - University of Freiburg, Freiburg (Germany), K. Schmitt - Fraunhofer Institute IPM, Freiburg (Germany)
- 133 - 134
The monitoring of the quality and the flow rate of the diesel exhaust fluid is essential for an efficient selective catalytic reduction in diesel combustion. This article presents a platinum thin film sensor using a combination of the constant temperature anemometry and the 3ω-method to measure continuously the urea content and the flow rate with compensated fluid dependence. The urea content can be determined within 3 % by weight and the flow rate within 4 % full scale. The presented method allows continuous monitoring of two main parameter in the selective catalytic reduction.