Uniform aerosol deposit sampling device

A uniform aerosol deposit sampling device comprising:

• a first housing having an air inlet, a first chamber, a conical portion, and a straight channel, said air inlet connecting with said first chamber, said air inlet having a cross-sectional area being smaller than a cross-sectional area of said first chamber, and said straight channel having a length substantially equal to or greater than the length of said conical portion;
• a second housing having an air outlet, a second chamber, a filter holder and a flow guiding portion;
• said first chamber connecting with said second chamber;
• said filter holder being disposed between said second chamber and said flow guiding portion for securing an air-penetratable supporting pad and a filter media, said air outlet communicating with said flow guiding portion, said air outlet having a cross-sectional area that is smaller than a cross-sectional area of said second chamber, said flow guiding portion being a substantially conical and gradually narrowing, said flow guiding portion having a semi-conical angle ranged from 15 to 85 degrees.