Glass Fiber Comparison Table
Compare grades, pore sizes, and specifications across all Sterlitech glass fiber filters
Glass fiber filters offer high flow rates, high loading capacity, and excellent chemical resistance — making them ideal for air monitoring, environmental testing, cell harvesting, and prefiltration applications. Use the table below to compare all available grades by pore size, thickness, weight, and other key specifications.
Not sure which grade to choose? Visit our Resource Center or contact our filtration experts for a recommendation tailored to your application.
| Grade | Pore Size (µm) | Thickness (mm) | Weight (g/m²) | Water Flow (sec)* | Gas Collection Eff. (%) | Pressure Drop (mm H²O) | Max Temp. (°C) | Binder | Characteristics |
|---|---|---|---|---|---|---|---|---|---|
| Grade A Borosilicate | 1.5 | 0.3 | 55 | 12 | n/a | n/a | 475 | None | Precipitate proteins and cell filtration |
| Grade B Borosilicate | 1.0 | 0.65 | 140 | 30 | n/a | n/a | 475 | None | Collection of biochemical polymers, prefilter |
| Grade A-E Borosilicate | 1.0 | 0.33 | 60 | 15 | n/a | n/a | 475 | None | Suspended solids and air monitoring |
| 934 AH Borosilicate | 1.5 | 0.43 | 64 | 47 | n/a | n/a | 550 | None | Standard for suspended solids content and related measurements (SM 2540D and EPA Methods 160.2) |
| Grade C Borosilicate | 1.1 | 0.28 | 50 | 25 | n/a | n/a | 475 | None | RIA procedures and harvesting lymphocytes |
| Grade D Borosilicate | 2.7 | 0.5 | 120 | 5 | n/a | n/a | 475 | None | Higher volume and repetitive laboratory filtering. |
| Grade E Borosilicate | 1.3 | 0.35 | 70 | 12 | n/a | n/a | 550 | None | Suspended particle analysis in water, cell harvesting, pre-filtration and air monitoring applications |
| Grade F Borosilicate | 0.7 | 0.4 | 80 | 80 | n/a | n/a | 475 | None | Diluted aqueous solutions containing strong oxidizing, acidic, or alkaline components prior to laser spectroscopy |
| DP-70 | 0.6 | 0.52 | 170 | 20 | - | 53 | 120 | Organic | High wet strength, very high loading capacity |
| GA-55 | 0.6 | 0.21 | 55 | 23 | 99.9 | 34 | 500 | None | General purpose paper |
| GA-100 | 1.0 | 0.44 | 110 | 11 | 96 | 20 | 500 | None | General purpose paper |
| GA-200 | 0.8 | 0.75 | 175 | 15 | 99.99 | 36 | 500 | None | Thick filter |
| GB-100R | 0.6 | 0.4 | 95 | 15 | 99.99 | 30 | 500 | None | Low trace metal content of As, Pb, and Cd |
| GB-140 | 0.4 | 0.56 | 140 | 58 | 99.99 | 113 | 500 | None | Compared to GB-100R: Thicker, greater wet strength, slower filtration speed |
| GC-50 | 0.5 | 0.19 | 48 | 28 | 99.99 | 53 | 500 | None | Prefilter |
| GC-90 | 0.5 | 0.3 | 100 | 20 | 99.99 | 42 | 120 | Organic | High wet strength |
| GD-120 | 0.9 | 0.51 | 123 | 14 | 97 | 17 | 500 | None | High wet strength, very high loading capacity |
| GF-75 | 0.3 | 0.35 | 75 | 84 | 99.999 | 170 | 500 | None | Most retentive grade |
| GS-25 | 0.6 | 0.22 | 70 | 15 | 99.9 | 32 | 120 | Organic | Limited dirt holding capacity, high wet strength |
| TCLP | - | - | - | - | - | - | - | - | Binder free, meets US EPA requirements for TCLP |
| Weighing Paper | - | - | - | - | - | - | - | - | Use for powdered samples. Nitrogen free, folds easily |
*Flow time is the time in seconds to filter 100 ml of distilled water at 20°C under pressure supplied by a 10 cm water column through a 10 cm² section of filter.
934-AH is a trademark of Whatman, Inc.
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