Thomas B9000-4 Borosilicate Glass Microfiber Filter, 1 Micron, Medium-Fast Flow, Grade B, 9cm Diameter (Pack of 25)

Depth filtration glass micro fiber. Fine porosity, medium to fast flow rate, with a 1 micrometer size particle retention. Ideally suited for the collection of biochemical polymers that have been precipitated by denaturation. This material is twice as thick as Grade A with a higher loading capacity. May also be used as a solid particulate filter for gasses or as a prefilter. Binderless borosilicate glass microfiber. 140 grams per meter squared basis weight. Depth filtration categorizes filter media that traps particulate within the random matrix of fibers found within the thickness of the media. The efficiency rating of the filter is characteristic of the complex pore structure that develops as the fibers overlap. The fibrous material within the filter is commonly glass micro fiber or polypropylene. In depth filters such as glass micro fiber, the purity of the filter is dictated by the presence of, if any, binder material that acts as a strengthening agent and aids in holding the fibers together. Because of the characteristically high flow rates of depth filters, they are generally used in applications such as single and multi-process removal of sediment and course particulate. Glass micro fiber filters are available without binders, making the inertmatrix an ideal medium to entra-sediment for further analysis and counting. Also, depth filtration media is commonly used as pre-filtration prior to surface filtration substrates such as membranes.

• Fine porosity and medium to fast flow rate
• 1 micrometer particle retention
• 30 Seconds filtration speed
• Ideally suited for the collection of biochemical polymers that have been precipitated by denaturation
• Binderless borosilicate glass microfiber