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Standard Qualitative Filter Paper Grade 305, Johnson

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.

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Key Specification

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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

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

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