The Apex portable particle counters are the worlds smallest and lightest 1.0 CFM particle counters. The Apex can store up to 3.000 records of particle count data from up to 4 particle channels and the configurable database can store up to 50 recipes for sampling and reports. The Secure Data Transfer allows all particle count data to be quickly and reliably transferred to a USB flash drive, computer, facility monitoring system or building automation system.