G - Physics
01
N
73/104, 341/39
G01N 1/22 (2006.01) G01N 1/24 (2006.01)
Patent
CA 1068127
ABSTRACT OF THE DISCLOSURE The present invention relates to an air sampling pump system for drawing air through a collection device. An electrically powered electroni- cally timed positive displacement air sampling pump contains a bellows to assure a constant displacement volume. This fixed volume is pumped at an electronically preset frequency to give a desired flow rate.
280082
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