Standard Qualitative Filter Paper Grade 303
This grade has a larger pore size than Grade 301, but with a lower filtration speed. Grade 303 also has higher absorption than Grade 301 is it used in general laboratory applications. Grade 303 is also found in agricultural and environmental laboratories for plant growth trials, soil testing and air analysis for monitoring specific contaminants and in the filtration of organic and sulfide precipitates.
Description
| Product Code | Diameter (mm) | Johnson Grade | Speed Class | Thickness (mm) | Pore Size (μm) | Weight (g/m²) | Filtration Speed (sec*) | Burst Strength (Kg/cm²) |
| 303055 | 55 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303070 | 70 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303090 | 90 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303110 | 110 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303125 | 125 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303150 | 150 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303185 | 185 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303240 | 240 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303300 | 300 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 303320 | 320 | 303 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
