Differential particulate mass monitor with intrinsic correction for volatilization losses
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United States of America Patent
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Mar 27, 2001
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N/A
app pub date -
Feb 2, 1999
filing date -
Feb 2, 1999
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Abstract
The mass of particulate matter in a particle laden gas stream is measured using a first mass detector and a second mass detector. Switching means causes the particle laden gas stream and a substantially identical but particle-free gas stream to alternately engage the first mass detector and the second mass detector respectively during successive measurement time periods. A difference between a reading provided by the first mass detector and a reading provided by the second mass detector for each of the successive measurement time periods is determined. This difference intrinsically corrects for volatilization losses occurring during the measurement time periods. A measure of the mass or concentration of particulate matter in the particulate laden gas stream is determined from this difference.
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