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