| GENERAL CHARACTERISTICS ITEM DESCRIPTION | ON-THE-SPOT MEASUREMENTS OF MASS CONCENTRATIONS OF THE RESPIRABLE FRACTION OR TOTAL MASS LOADING UP TO 20 MICROMETERS IN AERODYNAMIC DIAMETER OF DUST PARTICLES,PORTABLE AND FULLY SELF-CONTAINED MONITOR WITH AUTOMATIC AND DIRECT DIGITAL READOUT OF THE MASS CONCENTRATION OF AIRBORNE DUST,LWH 9X3.5X4 INCHES,12 V BATTERY |