PEMS Testing

A clear view of real-world emissions, wherever your vehicles operate

Real-world data reveals what laboratory testing can’t

Engines and powertrains behave differently the moment they leave controlled conditions. Loads rise and fall, temperatures shift and transient events create sharp swings that no fixed-duty test can fully capture. These gaps matter for compliance, optimisation, warranty protection and future product planning.

Our portable emissions measurement systems (PEMS) bridge this divide. We capture second-by-second data as vehicles and machinery operate in their true environments, giving you a clearer understanding of how regulated pollutants, including NOx, particulates,  and also other non-regulated pollutants such N2O and CH20  behave in the real world.

Advantages of independent, external PEMS testing and project management services

Internal resources are valuable. Allocating PEMS testing to internal teams diverts engineering time from future powertrains and strategic development.

Outsourcing real-world testing gives you:

  • More engineering time for tomorrow’s technologies

  • Consistent, independent data for customer, regulatory and internal reporting

  • Reduced operational burden when managing projects in distant regions

  • Rapid deployment without tying up internal personnel or equipment

With experience in Europe, India, South America, North America, Asia and Australia, we specialise in taking on the logistical complexity so your team doesn’t have to.

Light duty

Non-road mobile machinery

Heavy duty

Retrofit and aftermarket

Project examples

Real Driving Emissions (RDE): Independent verification and validation for WLTP and Euro 6/VI programmes.

Stage V In-Service Monitoring (ISM): Robust, real-world emissions surveillance for NRMM including construction, agriculture and mining machinery.

Euro VI In-Service Conformity (ISC): PEMS-based assessments to ensure heavy-duty engines remain compliant throughout their operational life.

Alternative fuels and additives benchmarking in real-world conditions: For example, HVO vs Diesel real-world performance

Retrofit accreditation: real-world emissions performance of powertrain and emissions abatement technologies

CWA 17379 / CEN for tailpipe NOx: Standardised NOx and NO₂ measurement compliant with recognised European methodologies.

Hybrid and electrified powertrains: Understanding the interplay between engine transients, battery state-of-charge, regeneration events and thermal effects.

  • “As we scale up our emissions testing on our ammonia-to-power powerpack, Emissions Analytics was always available to provide timely, detailed, and accurate information.  Our systems are novel and require much testing and refinement. We’ve been impressed with their diligence and commitment to excellence throughout every stage of the process.”

    Amogy, Inc.

  • ‘Emissions Analytics carried out emissions testing on diesel generators coupled to our flywheel hybrid system. They took over the work at very short notice and showed great competence and professionalism in all stages of the project. Despite the novelty and peculiarities of our test requirements, their team showed great adaptability, attention to detail and provided excellent communication at all times.’

    Punch Flybrid

What a typical PEMS project includes

  • Project scope - discuss test application and objectives

  • Selection, deployment and calibration of a full PEMS package

  • Machine evaluation and site visit

  • Test plan approval 

  • PEMS Installation

  • Test(s) real-time data collection in diverse environments and temperatures

  • Data QA, processing, correlation and regulatory comparison

  • A clear, independent report with actionable insights

Independent analysis you can build on

Better decisions through real-world insight

Our data helps:

  • Powertrain engineers optimise calibrations

  • Compliance teams reduce regulatory risk

  • Market teams better understand real-world performance

  • Fleet owners benchmark fuel use and emissions

  • Policy-makers ground decisions in evidence

  • Retrofit suppliers verify product effectiveness

Every dataset comes with clear interpretation so you can act with confidence.

Test methods

  • Regulatory/:pre-type-approval design and validation and post-type-approval in-use surveillance and testing for Real Driving Emissions (RDE) and Worldwide Harmonised Light Vehicle Test Procedure (WLTP)

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

  • [CWA 17379][0] from CEN for tailpipe NO<sub>x</sub>

  • Stage V In-Service Monitoring (ISM)

  • Euro VI In-Service Conformity (ISC)

  • USEPA CFR 1065

  • Benchmarking – vehicles and products

  • Intervention – before and after testing for products

  • Problem diagnosis and resolution.

We can test to these additional standards.

Where we test 

We’ve deployed PEMS on vehicles and machinery in locations including: Europe, North America, Latin America, India, South East Asia, Australia, Middle East.

Wherever your products operate, we can capture representative real-world duty cycles.

Our real-world advantage

The time and effort required for real-world emissions projects is often disproportionate to the value of the task, as it diverts engineers away from R&D. PEMS testing is essentially looking backwards - benchmarking technologies that you developed many months ago, perhaps years ago. Emissions Analytics will enable you to focus your resources on tomorrow. 

When tomorrow’s powertrain could go in several different directions, from H2 to hybrid, that time is valuable. Managing projects in distant and remote regions (India, South America, Asia, Australia) further compounds these costs. 

Emissions Analytics exists to relieve our partners of this inefficient burden. We are pleased to count several OEMs as clients who outsource the project management and testing process. Our PEMS testing expertise was recently validated by the Singapore Government, which selected us for a landmark research project, real-world emissions testing of x90 vehicles.

Agile project management and over a decade of PEMS testing experience across applications (from heavy-duty to marine and rail), Emissions Analytics ensures that projects are delivered efficiently and reliably
Deliverables:

  • Project management - including vehicle operator liaison

  • Reduce costs associated with staff travel, logistics and test equipment maintenance.

  • Independent, robust data for certification approval

Upcoming conferences

Ready to scope your next PEMS project?

Get in touch to arrange a short consultation with our team. We can help define the right test routes, regulatory framework and equipment package for your programme.

Request a PEMS scoping call

Test equipment

All of the below are available for field-based sampling, supported as necessary by the Emissions Analytics’ analytical laboratory.

Pollutant Measurement Equipment
CO Sensors SEMTECH-LDV PEMS
CO2 Sensors SEMTECH-LDV PEMS
NO Sensors SEMTECH-LDV PEMS
NO2 Sensors SEMTECH-LDV PEMS
NOx Sensors SEMTECH-LDV PEMS
N2O Markes International TD-GC-ECD
THC Sensors SEMTECH-LDV-FID PEMS
PN Sensors SEMTECH-LDV-CPN PEMS
PM Pegasor Mi2
NH3 ECM NH3CAN
CH2O DNPH + Agilent HPLC
Speciated VOCs Markes International TD-GCxGC-TOF-MS
SO2 Markes International TD-GC-TOF-MS
CH4 Markes International GC-TOF-MS
NHMC Sensors SEMTECH-LDV-Dual-FID PEMS
View presentation

Get in touch

Latest news