M135 MiniMOUDI™ impactors are precision, high-accuracy impactors with a 2.0 L/min sampling flow rate and a small physical size. They are available with 6, 7, 8, and 10 impaction stages to provide size-fractionated particle samples as small as 56nm. The 6- and 8-stage versions of the M135 are for personal sampling and are referred to as Marple Personal II impactors to replace the older Marple personal impactors on the market. (Model 135-6 shown for purposes of illustration.)