The "Andersen" Type Multi-Stage Cascade Impactor has been designed for determining the particle size (aerodynamic size distribution) in accordance with the specifications as laid down in USP and EP.
The unit is available in two versions for operation at 28,3 litres per minute or 60 litres per minute.
A Preseparator is interposed between the Induction Port and Stage 0 of the apparatus in order to collect large masses of noninhalable powder prior to their entry into the impactor.