ScienceDaily (Mar. 30, 2011—( A new air-quality measuring instrument invented by Pat Arnott and Ian Arnold of the University of Nevada, Reno that is more economical, more portable and more accurate than older technologies has been licensed for commercial development by Droplet Measurement Technologies of Boulder, Colo.

http://www.sciencedaily.com/releases/2011/03/110329151452.htm