Air sampler with parallel impactors
AssigneeSkc Co., Ltd.
InventorsSaulius Trakumas, Peter M. Hall
Life of this patent
Estimating the term…
Abstract
An air sampler is designed for a predetermined flow rate. The air flow is admitted to at least two impactors operating in parallel. Preferably the inlet nozzles and the outlet orifices of each impactor are sized to achieve predetermined cut-off sizes of particles; preferably the composite curve of all the impactors will mimic a predetermined particle sampling efficiency curve.
Claims7
An air sampler comprising a plurality of parallel impactors, each of said impactors having at least one inlet nozzle and at least one outlet orifice wherein either or both (a) at least one of said inlet nozzles is of a size different from the other inlet nozzles or (b) at least one of said outlet orifices is of a size different from said other outlet orifices, whereby said parallel impactors will permit the passage of air therethrough at predetermined flow rates when said air sampler is operated at a predetermined overall flow rate for said air sampler.
Dependencies are inferred from the claim text.