Method and apparatus for taking a proportional sample of...

Details Method and apparatus for taking a proportional sample of... Method and apparatus for taking a proportional sample of...

G - Physics

01

N

G01N 1/22 (2006.01) G01N 33/22 (2006.01)

Patent

CA 2104796

ABSTRACT OF THE DISCLOSURE Disclosed is a method and apparatus for taking a constantly proportional flowing sample of gas flowing through a main line having a first flow restriction therein. According to the teachings of the present invention, such an apparatus includes a sample line connected to the main line so as to draw a flowing sample of gas from the main line at a point upstream from the first flow restriction; a second flow restriction in the sample line, the second flow restriction being very small relative to the main and sample lines and the first flow restriction; and structure that equalizes the pressure downstream of the first and second flow restrictions.

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