Measuring apparatus for the determination of the particulates content of exhaust gases
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United States of America Patent
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Sep 27, 1983
Grant Date -
N/A
app pub date -
Aug 27, 1981
filing date -
Sep 11, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The particulates content of exhaust gases is determined by a sampling device connected to the exhaust supply line. The particulates in the exhaust gases are deposited onto a gas-permeable filter material and the particulates determined by light reflected from the filter material. A constant differential exhaust gas pressure is maintained and a predetermined sample volume per time unit is metered to the filter material. The total cross-section of the exhaust-gas flow through the measuring device is maintained constant. The sampling is taken in short consecutive intervals at a rate such that the characteristics of dynamic changes in the particulates content of the exhaust gas can be determined.
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