Abstract
Cascade impactors are widely used to collect size classified aerosol. A major disadvantage of this Instrument IS the required long sampling time Electrical low pressure Impactor has been developed to overcome this disadvantage and to achieve real-time measurements on the particle Size distribution The Instrument consists primarily of a corona charger, low pressure cascade Impactor and multi channel electrometer, We designed and evaluated the performance of a potable 3-stage low pressure Impactor using an electrical method. For the calibration of the Impactor, monodispersed particles were generated using evaporation-condensation method followed by electrostatic classification using a DMA(Differential Mobility Analyzer) The collection efficiency curves of the stages can be determined by analysing the fraction of particles collected by each stage<br/>
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