An article appeared in a special print publication Gefahrstoffe – Reinhaltung der Luft (Hazardous substances – air pollution control), entitled “Dilution systems for test aerosols: basic principles and application options” from Palas® experts.
Commercially available dilution systems have proven themselves in practice for diluting solid aerosols in the particle size range of approx. 2 nm to 20 µm. Dilution systems often act as separators in the dilution of droplet aerosols with droplet diameters above approx. 3 µm.
Since droplet aerosols larger than 4 μm cannot be reliably diluted with the dilution systems that are currently known and commercially available, Palas® GmbH has developed a new dilution system. In this design, the carrier gas of the aerosol is used as the dilution air. The aerosol measured by the welas® digital aerosol spectrometer is filtered, and this clean air is then fed back into the dilution system as dilution air. A small portion of this clean air is disposed of as waste air. The heart of this dilution system is still the mixing chamber, in which the droplet aerosols with a diameter of up to approx. 10 μm can be reliably and reproducibly diluted.
In the article, the authors reveal the principles of dilution systems and present a new development of Palas, especially for droplet aerosols.
If you are interested in the Dilution System Technical Article, please send us a short e-mail with the keyword ” Dilution System Technical Article” to info@palas.com.cn or click to register now to download the technical article as a pdf-format.