Positive and/or negative pressure is used to trap airborne particles against a filter. Positive pressure is provided by low molecular weight gas (He or H) to achieve high particle velocity and high capture percentage. Trapped particles are examined under electron microscope.
Atmospheric particle sampler
NASA Tech Briefs ; 1 , 1
1976-03-01
Miscellaneous
No indication
English
Polyport atmospheric gas sampler
NTIS | 1993
|Accurate Airborne Particle Sampler
NTRS | 1985
|NTRS | 2018
|