The Sartorius membrane filters product line includes a wide selection of membrane materials for the microfiltration with pore sizes from 0.1 µm to 8 µm and for the ultrafiltration with molecular weight cut offs from 300,000 to 1,000 Dalton. Typical applications for membrane filters are cell retention, particle collection, clarification and sterile filtration of aqueous solutions, particulate analysis, microbiological analysis and epifluorescence microscopy.