The Aerodynamic Aerosol Classifier
Launched in 2016, the Aerodynamic Aerosol Classifier is a unique aerosol instrument, capable of classifying particles between 25 nm and >5,000 nm (PM5) according to their aerodynamic diameter.
The AAC does not require the particles to be electrically charged (no radioactive or X-ray source is required for operation), which makes it simply the best way to produce a monodisperse aerosol.
Instrument calibration - e.g. optical devices such as Optical Particle Counters (OPCs) and WIBS
Classification of particles by aerodynamic diameter (e.g. inhalation studies, as an inlet to aerosol mass spectrometers).
Filter & facemask penetration efficiency testing by aerodynamic diameter.
Improved alternative to the Differential Mobility Analyzer (DMA) for producing a truly monodisperse aerosol.
Combine with a Condensation Particle Counter (integrated digital interface) to produce true aerodynamic size distributions over a wider size range and with better transmission efficiency than other devices such as the Scanning Mobility Particle Sizer (SMPS) which operates in the electrical mobility regime and is consequently limited by charging efficiency / charging artefacts.
Key Application Notes
|Title||Data Type||Download File||Size||Last Updated|
|Title||Using the Aerodynamic Aerosol Classifier (AAC) as a low-pass separator||Data Type||Application note||Download File||aac04v01-using-the-aac-as-a-low-pass-separator.pdf||Size||911.90 KB||Last Updated|
|Title||Measuring size-resolved particle penetration through face mask materials||Data Type||Application note||Download File||aac03v03-size-resolved-particle-penetration-face-masks.pdf||Size||708.53 KB||Last Updated|
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The AAC may be thought of as translating the DMA into a rotating frame, where the electrical force on the particles is replaced by a centrifugal force.
A practical tutorial on the Aerodynamic Aerosol Classifier, presented by Dr Jon Symonds, originally produced for the virtual AAAR conference 2020. Includes taking data, and cleaning.