Aerosol dilution systems considering the ejector principle with dilution factors constant in time from 1:10 to 1:1,000,000

DC system

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Dilution cascade with electrically operated pump to dilute highly concentrated aerosols with selectable dilution factors

KHG system

KHG 2010

Cascadable and heatable ejector dilution system, also in overpressure up to 10 bar.

VDD system

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Partial flow dilution system for droplet aerosols with infinitely variable dilution factor.

VKL system

VKL 10

Cascadable ejector dilution system for dilution factors of 10 – 1,000,000 also in overpressure up to 10 bar

PMPD system


Dilution system to remove volatile particles and to dilute highly concentrated aerosols for PMPD applications

In practice, the aerosols to be measured often have to be rendered measurable in terms of particle concentration by dilution. The ejector principle is the classic among the dilution systems and is described in VDI 3491-15. It is particularly characterized by the combination (cascading) of the individual dilution steps, whereby dilution factors of 10, 100, 1,000, 100,000 and 1,000,000 can be set. Depending on the model variants, the dilution steps can be configured for isothermal dilution of hot aerosols up to 200°C. Models made of stainless steel can be configured pressure-resistant up to 10 bar overpressure and are used successfully worldwide for measuring chemically aggressive aerosols. The "partial flow dilution system" VDD is recommended for diluting large droplets (approx. > 5 µm). The Palas® dilution systems are built to be robust, simple to operate and provide a clearly defined dilution factor. The dilution factors can be checked by the users themselves on-site.