"ANALYSIS OF CONTROLLED ENVIRONMENT ATMOSPHERE; USED FOR MONITORING PARTICULATE SIZE AND CONCENTRATION OF ANY AEROSOL; CONCENTRATION RANGE UP TO 1 MILLION PARTICLES PER CUBIC FT,COUNTS ALL PARTICLES 0.5 MICRONS IN SIZE AND LARGER AND 5 MICRONS AND LARGER; POWER REQUIREMENTS 115/230 VOLTS AC,50/60 HZ,150 WATTS"