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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 aluminium and magnesium hydroxides. Grade 305 is used in air monitoring and gas filtration when a 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
    mm: 55 Product code: 305055
    mm: 70 Product code: 305070
    mm: 90 Product code: 305090
    mm: 110 Product code: 305110
    mm: 125 Product code: 305125
    mm: 150 Product code: 305150
    mm: 185 Product code: 305185
    mm: 240 Product code: 305240
    mm: 300 Product code: 305300
    mm: 320 Product code: 305320