Microbial air sampler

A gas sampler device comprising:

• a top plate having a top surface and a plurality of holes;
• a bottom plate having a top surface and a ridge projecting upward from the top surface, said ridge defining a receiving portion for receiving a dish;
• a center well formed in the top surface of said bottom plate;
• a plurality of elongated slots formed in the top surface of said bottom plate and extending outward from said center well, each of said plurality of elongated slots having a proximal end in flow communication with said center well and a distal end in the ridge beyond the receiving portion;
• a gas passageway formed in said bottom plate, said gas passageway in flow communication with said center well and extending through said bottom plate to outside said bottom plate;
• and,
• a vacuum port located outside the bottom plate and in flow communication with said gas passageway, said vacuum port connecting to a vacuum tube;
• wherein gas is drawn into said device through said top plate to impinge on the dish and travel through said plurality of elongated slots into said well.