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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
    mm: 55 Product code: 303055
    mm: 70 Product code: 303070
    mm: 90 Product code: 303090
    mm: 110 Product code: 303110
    mm: 125 Product code: 303125
    mm: 150 Product code: 303150
    mm: 185 Product code: 303185
    mm: 240 Product code: 303240
    mm: 300 Product code: 303300
    mm: 320 Product code: 303320