Standard Qualitative Filter Paper Grade 305
This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. Grade 305 is used in air monitoring and gas filtration when high flow rate is needed. This grade is also found in routine cleanup analysis of insoluble liquids such as biological fluids and organic elements.
Description
| Product Code | Diameter (mm) | Johnson Grade | Speed Class | Thickness (mm) | Pore Size (μm) | Weight (g/m²) | Filtration Speed (sec*) | Burst Strength (Kg/cm²) |
| 305055 | 55 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305070 | 70 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305090 | 90 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305110 | 110 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305125 | 125 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305150 | 150 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305185 | 185 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305240 | 240 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305300 | 300 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
| 305320 | 320 | 305 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |
