Index >> Air Microbiology >> Millipore Filter

Millipore Filter - This type of filters are made of pure and biologically inert cellulose ethers. They are prepared as thin porous, circular membranes of about 150 µm thickness. The filters have different porosity. Grades from 10nm to 811m. The assemblage contains a funnel shaped inlet and a tube like outlet. In between these two the filter is fitted.

The outlet may be connected to a vacuum pump to suck known amount of air. After collecting required volume of air through the filter, it can directly be placed onto the surface of a solid medium. After incubation colonies formed can be counted.