This brochure introduces the P-Trak™ Ultrafine Particle Counter (UPC), an instrument used by indoor air quality professionals which is designed to detect and count ultrafine particles. The brochure presents situations where these particles can be found, the technology behind the UPC, and the features of this instrument. The brochure also contains a sample ultrafine particle data display from the company’s Data Analysis Software included with the UPC, and a schematic depicting the condensation particle counter used to measure the particles.

— TSI Incorporated

St. Paul, MN