Patent ID: 8205512

Claim:
An air tester for testing for the presence of biological, explosive, chemical or nuclear particulates in the air, comprising: a collection tube; an air inlet to receive air and to channel the air through a first opening in a wall of the collection tube; and a removable insert insertable into the collection tube and having interior walls, the removable insert collecting liquid and particulates on the interior walls of the insert; the removable insert being positionable to align a first opening in a wall of the insert with the first opening in a wall of the collection tube to allow air to pass through the aligned openings, the removable insert being substantially concentric with the collection tube; a wall of the collection tube having a second opening to a detection path; a wall of the insert having a third opening that, in a detection mode aligns with the second opening in the wall of the collection tube when the first opening in the wall of the collection tube is aligned with the first opening in the wall of the insert, to allow air to pass through the insert to the detection path.