Dust Monitor  – The microdust pro real-time dust monitor kit from casella usa is a portable, real time monitor for assessing the concentration of suspended particulate matter, and is probably the most versatile instrument available with the ability to measure from 1µgm-3 to 2500 mgm-3. It is the only handheld real-time dust monitor on the market capable of graphically presenting variations in dust concentration on a real time scrolling graph – no longer is it necessary to wait to analyze results on a pc.