Type A/E Glass Fiber
- For gravimetric analysis of air pollutants and testing dissolved/suspended wastewater solids
- High flow rates, wet strength, and dirt (solids) holding capacities
Type A/B Glass Fiber
- High dirt-loading capacity with thicker glass
- Manufactured of the highest quality borosilicate glass microfibers
Depth Filter Pore Size Rating
A "nominal" or approximate pore size rating is usually applied to depth filters. Unlike membrane filters, depth filters do not contain a uniformly defined pore structure, but rather fibers or sintered particles that intertwine to create a torturous path of openings that allow air to pass through, but trap particles throughout the depth of the filter. Because of this structure, depth filters are usually tested for pore size by passing liquid containing particles of a certain size through the filter. If the filter traps an acceptable amount of the specific-size particles (despite the openings in the filter being larger than the test particles), that particle size becomes the "liquid nominal" pore size rating for the filter. Nominal pore size ratings are typically stated as, "Filter removes > xx % of particles = x µm."
A typical filter will have a rough side and a shiny side. The shiny side is easier to read under a microscope, therefore, expose the shiny side to the air for microscopic analysis. The rough side holds dust more effectively; expose the rough side for gravimetric analysis.
Custom Filters Available
For specific applications, SKC will manufacture filters to meet your specific requirements. Download the Custom Filter Order Form in PDF format. Complete the form and fax it to your SKC representative, contact your SKC representative, or call the SKC Sales Department at 724-941-9701for more information.