ePNC Diffusion-Charging Based Particle Number Counting Technology as Alternative to Condensation Particle Counting Based Methods.

Particle Number (PN) measurement testing has for long been conducted by using Condensation Particle Counter (CPC) based technology. While accurate at low concentrations, CPC has nevertheless several drawbacks for in-field use, such as the use of a working fluid, the need for dilution, and the sensitivity to contamination. Diffusion Charging (DC) based particle counting technologies have often been disregarded as a valid alternative to CPC based methods due to their intrinsic particle size dependent counting efficiency. However, Dekati’s novel ePNC PN technology has brought DC technology to the next level. Due to its patented technology, the Dekati ePNC’s particle counting efficiency is near size independent, turning DC as a competing technology for CPC, especially for demanding field applications, such as Portable Emission Measurements Systems (PEMS) for Real Driving Emission (RDE), and brake and tire wear measurements. These applications require the ability to continuously measure elevated particle concentrations with sufficient accuracy in often harsh environments during on-road testing. In this presentation we will look closer into the ePNC technology and show the results of recent measurement campaigns that prove the suitability of the Dekati ePNC’s DC technology as alternative to CPC methods.