The TISCH Environmental cascade impactors are modular systems for gathering aerosols according to the desired size range. 

Depending on the model, the TISCH Environmental impactors are used to gather live aerosols on a petri dish, high-flow aerosols together with the samplers or even personal impactors. The gathering substrates for the impaction levels may be customized depending on the application: fiber-glass, quartz, cellulose, aluminum, and so on.