Biological air sampling device

A method for collecting biological air contaminant samples, comprising the steps of:

• attaching one or more air sampling cassettes to one or more air inlet orifices of an air sampling device,
• wherein each sampling cassette has a sampling cassette internal diameter and a sample collection media disposed within the cassette internal diameter and the sum of the interior diameters of the air sampling cassettes is from about 2.5 mm to about 65 mm, and
• wherein the air sampling device comprises a casing having a cross-sectional area of less than 10 square inches, the one or more air inlet orifices, an air outlet orifice, and an interior passageway in flow communication with both the air inlet orifices and the air outlet orifices, and a fan disposed within the casing interior passageway;
• drawing air through the one or more air sampling cassettes at an air flow rate from about 0.5 to about 2.0 liters per minute;
• collecting biological air contaminants on the sample collection media;
• and
• removing the one or more air sampling cassettes from the one or more air inlet orifices,
• wherein the air sampling device produces a noise level of less than 40 dBA, measured at a distance of 1 foot from the air outlet orifice, when the air flow rate is from about 0.5 to about 2.0 liters per minute.