ACI 6 Stage Viable Cascade Impactor

The design concept of the Multistage Viable Impactor evolves from the following information:

The human respiratory system tract is an aerodynamic classifying system for airborne particles. A sampling device can be used as a
substitute for the respiratory tract as a collector of viable airborne particles, and as such, it should reproduce to a reasonable degree
the lung penetration by these particles.

Viable particle samplers must satisfy the following criteria:

• Particles must be separated from the air and “physically” captured onto a suitable impaction surface (particle collection efficiency);
• For viable bioaerosols, the viability is critical and shall be maintained during sampling to be representative of actual levels of exposure to the pathogen (biological collection efficiency).