The Dylos DC1100 Pro Air Quality Monitor with PC Interface is a particle counter that measures particles in two size ranges: 500 nanometers and above and 2.5 micrometers and above. The Pro series comes with the added PC interface.

A Laser Particle Counter with 2 size ranges (>0.5 & >2.5 microns) – small (bacteria, mold, etc) and large (pollen, etc.). DC1100 Pro has increased lower sensitivity – detecting particles down to 0.5 micron.