The Biotest APC Ergo Touch Airborne Particle Counter instantly measures levels of particles present in the air and provides a real time indication of potential contamination. The logic behindmonitoring for aerosol particles is that they could possibly carry microorganisms. The Ergo Touch offers two channels fixed at 0.3 µm and 5.0 µm, with a third adjustable to read 0.5, 1.0, 2.0, or 2.5 µm. Features include 0.1 CFM (2.83 L/min flow rate), large LCD display, USB connection with 1,500 data record memory. Accessories included with the instrument: power supply, battery, isokinetic inlet, purge filter, ErgoTrak Lite date download utility, operation manual (CD), Quick Start Guide, and certificate of calibration to NIST. Use when environmental conditions favor airborne contamination.