Gas sampling method and dilution tunnel therefor
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United States of America Patent
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May 2, 1995
Grant Date -
N/A
app pub date -
Aug 25, 1993
filing date -
Aug 25, 1993
priority date (Note) -
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Abstract
Emission gasses from an engine exhaust pipe are collected through an inlet of a dilution tunnel which is an elongated, hollow tube. The inlet is spaced from the exhaust pipe to also admit surrounding air. The air and emissions are mixed in the tunnel by a screen in the tunnel. A probe in the tunnel diverts a portion of the mixture to gas analyzers. Prior to analysis the mixture may be condensed, filtered or otherwise processed.
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