Prof. Matthias Klingner of the German Fraunhofer-Institut conducts roadside NOx measurements in Stuttgart with the ECO PHYSICS CLD 66. The ECO PHYSICS CLD 66 is used to display the variations of the measured NOx values in relation to the sampling point. The NOx measurements are discussed at 16:45 in the report.
Link to the report: http://www.daserste.de/information/reportage-dokumentation/dokus/videos/exclusiv-im-ersten-das-diesel-desaster-video-102.html