Measures 0.3 micron particles and larger at 1.0 CFM, offers 6 size channels with individual alarms for each size. The 2408 stores up to 500 data samples, with location labels (0-999) in its memory and performs 209 calculations. Includes RS232C interface. Order with either internal or external printer. Options are, relative humidity/air temperature and air velocity sensors, High Pressure Diffuser and Universal utility Software. 300 watts at 115Vac.