Patent ID: 7140266

Claim:
A device for determining the size distribution of aerosol particles from a flow, comprising: an electric mobility analyzer operative to receive the flow; and an impactor comprising a first stage including a nozzle part, wherein the impactor is operative to receive the flow from the electric mobility analyzer and is operatively connected to the mobility analyzer in such a way that the nozzle part of the first stage of the impactor also forms a bottom plate of said mobility analyzer, and said mobility analyzer and said impactor are designed so that said mobility analyzer collects from the flow particles smaller than a given mobility diameter value, and said impactor collects from the flow particles larger than a given aerodynamic diameter value, and wherein said mobility diameter value is such that said mobility analyzer operates on a particle size range where a measurement accuracy of said mobility analyzer is better than a measurement accuracy of said impactor and wherein said impactor measures particles within a particle size range where the impactor has a better measurement accuracy that the mobility analyzer.