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    305

    What is 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.

    Whatman Cross Reference = No.4
    Speed class Fast Filtering
    Thickness (mm) 0.20
    Pore size (μM) 12-15
    Weight (g/m²) 84
    Filtration Speed (sec*) 10
    Burst Strength (Kg/cm²) > 0.30
    *According to DIN 53137
    Diameter (mm) Product Code
    55 305055
    70 305070
    90 305090
    110 305110
    125 305125
    150 305150
    185 305185
    240 305240
    300 305300
    320 305320