Roadside NOx is an important contributor to clean air considerations and the identification of individual “gross emitters” can be an important part of evaluating the success of clean air zones. Cambustion make fast response gas analyzers capable of measuring NO and NO2 to parts-per-billion concentrations within a fraction of a second.
These analyzers have been used previously for plume dispersion studies, enforcement activities, route optimisation, cabin air quality and the identification of urban NOx “hot spots” using on-board measurements.
The equipment is also useful for rapid “spot-checking” of idling vehicles or to assess the effectiveness of natural or man-made barriers such as hedges or bus shelters to shield humans from the sometimes alarmingly high instantaneous concentrations of NOx which can be inhaled on the kerbside.
More details including specimen applications available at: https://www.cambustion.com/industries/air-quality