Optics: measuring and testing – By particle light scattering
Reexamination Certificate
2006-03-30
2010-02-23
Punnoose, Roy (Department: 2886)
Optics: measuring and testing
By particle light scattering
C356S338000
Reexamination Certificate
active
07667839
ABSTRACT:
A particle sensor for optically detecting an unconstrained particle suspended in a flowing gas includes a sample chamber having a gas inlet and a gas outlet; a gas flow system for flowing said gas from said gas inlet through said sample chamber to said gas outlet, a source of light; an optical system directing said light through said sample chamber, an optical collection system located to collect light scattered by said particles in the gas, and a detection system located to detect the collected light. The total pressure drop through said gas flow system is 3 inches of water or less. The gas flow system includes an axial fan, which may be a high static pressure fan or a counter-rotating fan. In a 1.0 CFM system, the gas inlet nozzle has an area of 25 square millimeters or more.
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International Search report by EPO corresponding to PCT/US2007/007158, Mailed Sep. 13, 2007.
Greenlee Winner and Sullivan P.C.
Particle Measuring Systems, Inc.
Punnoose Roy
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