Particle measurement technology
Particle measurement technology
Why measure particles in diesel exhaust gases?
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Legal requirements & PTI: Particle measurement (PN) in diesel exhaust gases is increasingly being integrated into regular testing procedures. The aim is to reliably detect defective or manipulated particle filters.
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Health & environment: Ultrafine particles penetrate deep into the lungs. Precise particle counting supports emission reduction and air quality targets.
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Safety & reliability: Modern particle measuring devices deliver reproducible results – even at very low particle concentrations.
FAQ on particle counting technology
Which vehicles are affected by particle measurement?
All diesel cars with particulate filters from Euro 6d (approximately from 2021) are subject to particle count measurement during the emissions test. In future, petrol cars with direct injection could also be covered – corresponding pilot projects are already underway.
What is the KNESTEL Particle Counter PNC nano?
The PNC nano is a ready-to-use diesel exhaust particle counter leveraging Clean Charging Technology and Faraday Cup contactless detection. It complies with PTB‑A certification standards and is type‑tested in Germany (PTB) and the Netherlands (NMI). The PNC nano is a precise particle measuring device used in exhaust gas testing. Further information can be found here.
What is the “Modules‑in‑Flow” system?
An assembly of functional sensor modules (e.g. charging unit, ion/particle separator, sensor Faraday Cup, Volatile Particle Remover). Customers can build their own housing around this proven, tested sensor structure and connect via RS‑232 (CAN available on request). Further information can be found here.
What is the PNR 1000 K Reference Calibrator?
A portable, market-ready calibrator combining a stable salt (NaCl) generator and a reference particle counter in one unit. It supports on-site calibration of multiple PN devices, ensuring traceability (EN 17025) and compliance with German AU calibration regulations effective since January 1, 2023. Further information can be found here.
How does the particle counting technology work?
The system employs diffusion charging (DC): aerosol particles are ionized via corona discharge, then charged through diffusion. The charged particles induce an electrical current in the Faraday Cup sensor module, which is measured—without consumables or sample gas heating. This enables precise particle counting without the need for emission tester with moving parts.
Is particle measurement mandatory for diesel vehicles?
Many markets are gradually introducing PN measurement or have already integrated it. Concrete requirements are regulated on a country-specific basis. In Germany, particle measurement is already part of the exhaust emission test (AU) carried out as part of the general inspection (HU).
In which applications is the particle counter suitable?
- Vehicle exhaust emission testing (e.g. PTI compliance)
- Development of DPF and SCR systems
- End‑of‑line and endurance testing
- PEMS and mobile emission measurement
- Engine/filter/fuel research and industrial laboratories
What does a particle counter measure in diesel exhaust gases?
A particle counter records the number of ultra-fine particles (PN) in the exhaust gas – not the mass. This is particularly effective in detecting defective or manipulated particulate filters.
Can I integrate the particle counter into an existing testing system?
Yes – we also offer our systems as OEM modules with standardized interfaces (CAN, Modbus, analogue). This means that particle measurement can be easily integrated into existing test benches, software solutions or test devices.
What are the key advantages of the PNC nano system?
- No consumables needed—no maintenance-intensive fluids.
- Contactless sensing avoids wear and nozzle contamination.
- Modular design ensures simple cleaning and speedy repairs.
- Certified according to PTB‑A for EU-wide use.
Das PNC nano ist ein äußerst zuverlässiges Abgasgerät, dass bei der Partikelmessung und Abgasuntersuchung eine präzise und kostengünstige Lösung bietet.
Why is particle number (PN) measurement important in emissions testing?
- Legal compliance: Diesel vehicles from Euro 6d (circa 2021) are now subject to PN measurement in emissions testing; petrol direct-injection vehicles are being piloted for future inclusion.
- Health & environmental impact: Ultrafeine particles are harmful. Accurate PN measurement helps support air quality and emission reduction goals.
- Reliability & safety: Highly reproducible measurements—even at low particle concentrations—enhance system reliability und increase the efficiency of vehicle testing.
What support does KNESTEL offer beyond products?
Full-service support includes: initial consulting, OEM customization, integration services, software for guidelines compliance, white papers, user manuals, FAQs, and ongoing maintenance advice. We help you to effectively integrate the particle counter into your exhaust gas tests and investigations.