FILTECH 2024 and new article in International Filtration News

We're looking forward to being back in Cologne tomorrow for FILTECH 2024!

Recently we published an article in International Filtration News on using particle classifiers to construct the minimum efficiency curves of air filter media (such as HEPA grades). This shows how classifying with an Aerodynamic Aerosol Classifier (AAC) instead of using an electrostatic technique yields a higher concentration of truly monodisperse test particles, without any charging effects that require correction.

This Wednesday in the G10 session, our FILTECH poster "Comparison of different classifier techniques for determining the most penetrating particle size (MPPS) of high efficiency air filters" will give details on the worst case scenarios for filtration errors when classifying aerosols by electrical mobility diameter. These errors come from the transmission of larger, multiply charged particles and depend on the position of the mobility setpoint relative to the peak of the input aerosol size distribution and the MPPS of the filter. The setup and data analysis are simplified using an AAC, and classifying by aerodynamic diameter means it's even possible to obtain accurate results using just a single nebuliser without any radioactive/X-ray charge conditioner.