Cascade impactor for size distribution analysis of medicinal aerosol particles, has test cover mounted on impactor, whose passageways have bores connectable to external pressure sensor

摘要

A test cover (24) having passageways similar to that defined by another cover for fluid flow is mounted on impactor (10). Each passageway of cover (4) has a bore connectable to external pressure sensor. Independent claims are also included for the following: (a) Latch assembly; (b) Enclosed groove forming method; (c) Seal plate.