Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1998-01-26
2000-04-25
Kim, Robert H.
Optics: measuring and testing
By particle light scattering
With photocell detection
356336, 356335, 356339, 356340, 356337, 250574, G01N 2100, G01N 1502, G01N 1506
Patent
active
06055052&
ABSTRACT:
System for, and method of, monitoring airborne particulate, including particulate of the PM.sub.2.5 class. The system for monitoring airborne particulate includes an optical sensor to measure size characteristics of sampled airborne particulate and a humidity sensor to measure relative humidity. An adjusted airborne concentration value is then produced in response to the measured size characteristics and to the humidity measurement. According to one embodiment the optical sensor is implemented as a multi-wavelength nephelometer, e.g., two-wavelength nephelometer. According to another embodiment the humidity sensor is placed relatively near the optical sensing region and makes a relative humidity measurement.
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Kim Robert H.
MIE Corporation
Punnoose Roy M.
LandOfFree
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