Reliable DPF Performance Testing

Accurate diesel particulate filter (DPF) testing is essential for reducing vehicle emissions and ensuring compliance with tightening regulations. Pegasor Particle Counter (PPC) measurement device offers a fast, user-friendly solution for verifying the condition of DPFs in both light- and heavy-duty vehicles. The PPC technology is already in widespread use across Europe in countries where PN measurement is required during periodic vehicle inspection (PTI or MOT). It is officially approved for this use in Germany, the Netherlands, Belgium, and Switzerland.

DPFs are critical for capturing harmful ultrafine particles produced during diesel combustion. A properly functioning DPF can reduce particle number emissions by more than 99%. However, conventional optical measurement methods—still commonly used at inspection stations—are unable to detect when a filter is damaged, removed, or has degraded internally. This creates a serious blind spot in emissions monitoring.

As a result, high-emitting vehicles may go undetected, contributing disproportionately to local air pollution and posing environmental and health risks. To close this gap, more sensitive and reliable measurement technologies are needed—especially ones that can accurately identify the presence and effectiveness of after-treatment systems under real-world conditions. Pegasor’s measurement technology is designed specifically for this purpose, offering an effective and future-proof solution for emissions compliance and vehicle condition checks.

Why Test Diesel Particulate Filters?

With Pegasor’s proprietary measurement technology, high-emitting vehicles can be reliably identified. Faults in emission after-treatment systems can be diagnosed and addressed before they lead to excessive emissions or regulatory violations.

In many regions, new legislation is being introduced to prevent emissions system tampering. Vehicles with removed or malfunctioning filters can exceed type approval particle limits many times over. For inspection stations, fleet managers, and car dealerships, verifying the condition of DPFs is an increasingly important way to minimize environmental impact and financial risk.

Key Features

  • Pegasor’s Patented Electrical Measurement Technology
    • Fast and precise particle number measurement based on Pegasor’s proven innovation.
  • Wide Dynamic Range
    • Accurately measures both low concentrations (clean ambient air, functional DPF) and high levels (raw exhaust).
  • Quick and Simple Operation
    • Exhaust sampling takes just 20–30 seconds while the vehicle is idling.
  • Versatile Compatibility
    • Includes a 2 m or 4 m sampling probe. Suitable for both light-duty and heavy-duty vehicles.
  • Instant Results
    • Results are displayed immediately on a PC or tablet and can be saved or printed in PDF format.
  • Designed for High-Volume Use
    • Built for frequent operation with minimal maintenance. Pegasor offers calibration and expert support services to ensure consistent, reliable performance.

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