What is the particulate path?
(1) Air travels through the impactor and the larger, heavier particulates will stick to the greased plates within the impactor. (2) While the pump maintains the flow rate, the smaller, lighter particulates will pass through the optical engine, (3) and will collect/trap in the gravimetric filter/cassettes. (4) The remaining clean/filtered air passes through the pump, (5) then to the pressure sensor (flow-control orifice hole), (6) and lastly to the Outlet on the back of the instrument.
