Instrument: cascade impactor

A cascade impactor measures the reach range of a particulate substance as it moves through an opening with the use of aerosol. In addition to measuring the range of substances moved through an opening by aerosol, the impactor can also be used to determine the particle size of the distributed substance.

The Tisch Environmental, Inc. High Volume Cascade Multi-Stage Particulate Size Fractionator Impactor (Series 230) is one example of such a device.