You can measure gross particulate levels with indication of sizing using something like this: https://www.sparkfun.com/products/9689 https://www.sparkfun.com/p

You can measure gross particulate levels with indication of sizing using something like this: https://www.sparkfun.com/products/9689 https://www.sparkfun.com/products/9689 This would give you some indication of what's floating around. Further analysis like what dalke mentioned would be necessary to figure out exactly what the particulate makeup is. edit - The sharp sensor does not give an indication of sizing.