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Air Quality

Recent improvements have led to the 50-series of analysers, combining the ultra-fast response times of the 500-series with enhanced levels of sensitivity as seen in the scenarios below. This has allowed investigations into the real emissions exposure from vehicles and other sources which is masked by slow response times of traditional air quality instruments.

Cambustion's fast response (high frequency) gas analysers are available in versions which support measurement of HC, NOx and CO&CO2 on board a vehicle.

Coupled with GPS and video recording, this allows the tailpipe emissions from an ICE vehicle in normal operation to be monitored, and mapped spatially.

This can be used to understand both the performance of the vehicle and specific areas for improvement, and the opportunities to reduce both emissions and human exposure through intelligent road design.

The video below summarises a few example applications and demonstrates the ease of use and portability of the CLD50.

Fast NO Measurement from Speedbump

Ultra-Fast Ambient NO Measurements using a CLD50

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The video below highlights the possible high concentration exposures to vehicle occupants from toxic exhaust gases produced by the vehicle in front.

In-Cabin NOx Pollution from Surrounding Vehicles

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Recent legislation has introduced emission limits for new Non-Road Mobile Machinery (NRMM). However there are many existing products currently in use producing high levels of toxic exhaust gases potentially causing harm to nearby workers or pedestrians. The snapshot below shows possible exposure concentrations. Modern aftertreatment systems would drastically reduce these tailpipe emissions under the vast majority of operating conditions.

Roadside Exposure from Non-Road Mobile Machinery

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The train shown in the video below has it's exhaust outlet pointing vertically as is typical for many diesel-electric trains. By sampling from nearby railway bridges, one is able to get an idea of possible pollution contributions from these trains in urban areas.

Pedestrian NOx Exposure from Trains

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