PEMS testing

Whether for R&D, regulatory preparation or benchmarking, our customers turn to us for unrivalled expertise in the application of Portable Emissions Measuring Systems (PEMS).

We measure fuel economy, gaseous emissions and particulates, mass & number.

What we test

  • Passenger cars

  • Light commercial vehicles

  • Heavy duty vehicles

  • Non-road mobile machinery (NRMM)

  • Marine vessels

Types of testing

  • Benchmarking – vehicles and products, such as fuels

  • Intervention – before and after testing for products, such as additives

  • Regulatory – pre-type-approval design and validation and post-type-approval in-use surveillance and testing for Real Driving Emissions (RDE), and Worldwide harmonized Light vehicles Test Procedure (WLTP)

  • Non-regulatory – off-cycle real-world testing

  • Problem diagnosis and resolution

What we measure

  • Carbon monoxide (CO) and Carbon dioxide (CO2)

  • Nitric oxide (NO) and Nitrogen dioxide (NO2)

  • Oxides of Nitrogen (NOx = NO + NO2)

  • Total hydrocarbons (THCs)

  • Particulates down to the ultrafine level

  • Fuel economy (MPG) and fuel consumption (L/100km)

Example PEMS test applications

  • Mainstream fuels – premium fuel, E10 gasoline

  • Additives – engine cleaners, fuel enhancers

  • Exhaust after-treatment systems – Selective Catalytic Reduction Technology, Lean NOx Trap

  • Tyres – heat-treated rubber

  • Low carbon technologies – hydrogen-on-demand systems, micro hybrid systems

  • Alternative fuels – compressed natural gas, liquefied natural gas, biofuels

  • Engine calibrations – optimisation testing

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