Labtron handheld airborne particle counter is a microcomputer controlled, versatile 6 channel device perfect for clean room applications. It operates at a flow rate of 0.1 CFM (2.83 L/min) and supports test periods from 1 to 15 min. Features like an internal audible alarm, user-selectable alarm limits and 8 hours of continuous battery life make this device an ideal choice for clean room applications.