Discharge systems for electrically charged aerosols of solid particles or drops

Aerosols can be highly electrically charged. This charge can significantly falsify a particle measurement. For example, in filter testing using a charged aerosol, a filter may under certain circumstance be rated as far too good (liability problem for the filter manufacturer).

The Palas® discharger systems (corona discharge) have been used successfully for many years to neutralize charged aerosols. Neutralizing means that a balanced charge distribution is established in the aerosol. Palas® offers various discharger systems for different applications:

The CD 2000 systems work according to the principle of a bipolar corona discharge and are used universally for filter testing and aerosol research. No special authorizations are required for this.

With the Kr-85 neutralizers, the emitted β-radiation generates both positive and negative ions through ionization.


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