| US 7,536,898 B2 | ||
| Quantitative aerosol dilution system | ||
| Miles C. Owen, Huntsville, Ala. (US) | ||
| Assigned to The United States of America as represented by the Secretary of the Army, Washington, D.C. (US) | ||
| Filed on Sep. 21, 2007, as Appl. No. 11/859,124. | ||
| Claims priority of provisional application 60/954984, filed on Aug. 09, 2007. | ||
| Prior Publication US 2009/0044599 A1, Feb. 19, 2009 | ||
| Int. Cl. G01N 1/00 (2006.01) | ||
| U.S. Cl. 73—28.04 | 16 Claims |
| 1. An aerosol dilution system, comprising:
an inlet conduit (32) connected to an aerosol source (100) having an initial particle concentration;
a first flow path (34) connected to the inlet conduit (32), said first flow path having a high particle counter (62) positioned at an end thereof;
a second flow path (36) connected to the inlet conduit (32), said second flow path branching to form a third flow path (38) and a fourth flow path (40), said third and said fourth flow paths meeting at a junction (50);
a flow restrictor (42) positioned in said third flow path (38), the initial particle concentration of said aerosol source (100) and an initial particle concentration received by said flow restrictor being identical;
a filter (44) and a flow meter (46) connected in series in said fourth flow path, said filter (44) being in direct contact with said aerosol source;
an outlet path (52) connected to said junction (50), and wherein a low particle counter (54), a second filter (56) and a second flow meter (58) are positioned in said outlet path.
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