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US 6,786,105 B1Granted
Personal particle monitor
AssigneeUniversity of Southern California
InventorConstantinos Sioutas
Life of this patent
Estimating the term…
Abstract
Provided is a personal sampler for PM that allows separation of airborne particles in several size ranges and operates at a high flow rate (9 L/min) by personal sampling standards that makes chemical analysis of the size-fractionated particles possible within a period of 24 hours or less.
Claims25
A device comprising:
- an inlet port at a first end;
- a pump fluidly connected to the inlet port;
- a plurality of orifice plates, each orifice plate comprising an orifice;
- a plurality of impactor stage plates, each impactor stage plate comprising an impaction surface having a predetermined cutpoint for particulate matter, which allows characterizing particles from about 10 μm to less than 0.25 μm;
- and
- a filter plate at a second end,
- wherein the inlet port is fluidly connected to the filter plate such that a pressure drop from the first end to the second end is between about 8 and 15 inches of H2O with a flow rate of between 7 and 11 liters per minute (LPM), each orifice plate and impactor stage plate alternately disposed between the first end and second end, wherein each orifice plate is immediately followed by an impactor stage plate.
4 more elements
A personal cascade impactor sampler (PCIS) system, comprising
- a miniaturized cascade impactor assembly (MCIA) comprising:
- an inlet port at a first end;
- a plurality of orifice plates, each orifice plate having an orifice;
- a plurality of impactor stage plates, each impactor stage plate comprising an impaction surface having a predetermined cutpoint for particulate matter;
- and
- a filter plate at a second end,
- wherein the inlet port is fluidly connected to the filter plate such that a pressure drop from the first end to the second end is between about 8 and 15 inches of H2O, each orifice plate and impactor stage plate alternately disposed between the first end and second end, wherein each orifice plate is immediately followed by an impactor stage plate;
- a pump, fluidly connected to the MCIA such that the pump maintains a flow rate of between about 7 and 11 liters per minute (LPM);
- and
- a power device in electrical communication with the pump.
7 more elements
Dependencies are inferred from the claim text.