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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.

Properties
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
Available Sizes
Diameter (mm) Product Code
55 305055
70 305070
90 305090
110 305110
125 305125
150 305150
185 305185
240 305240
300 305300
320 305320