The Graseby Andersen Mark III Eight-Stage Cascade Impactor is a multi-stage, multi-jet impactor for stack particulate effluents in moderate grain loading applications. Andersen’s impactor is made of stainless steel with Inconel O-rings and is able to withstand temperatures of 1500° F, if used without special collection substrate and back-up filter. If your application requires a substrate filter, the impactor will only withstand temperatures up to approximately 800° F. The gooseneck inlet nozzle and internal high capacity preimpactor fit through a minimum 3″ port.  CleanAir Analytical now offers tared Andersen impactor substrate sets and full post analysis.