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    303

    What is 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 and it is 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.

    Whatman Cross Reference = No.2
    Speed class Medium Filtering
    Thickness (mm) 0.16
    Pore size (μM) 5-8
    Weight (g/m²) 87
    Filtration Speed (sec*) 50
    Burst Strength (Kg/cm²) > 0.10
    *According to DIN 53137
    Diameter (mm) Product Code
    55 303055
    70 303070
    90 303090
    110 303110
    125 303125
    150 303150
    185 303185
    240 303240
    300 303300
    320 303320