The Tisch Environmental PM2.5 high volume air sampler is a specialized instrument for non-regulatory sampling and institutional studies. It uses a size selective inlet with 40 stainless steel nozzles to collect only particulate matter that is 2.5µm or less. This type of particulate matter can be especially dangerous to human health. The sampler operates at a high volume of 40 Cfm and uses 8 “x10” filters made of Teflon or Micro Quartz. It is available with either a brushless motor or brush motor and includes flow and pressure loggers as well as a 7-day mechanical timer, with an optional digital timer available.