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Sartorius Sterile 47 mm Membrane Filters

Sterile, individually wrapped membranes have a 0.45 µm pore size. They are made of cellulose nitrate (cellulose ester), a material that assures effective retention with high flow rates and optimum colony growth. The printed grid divides the filtration area into 130 squares (each measuring 3.1x3.1 mm) which makes the counting easier, especially for higher bacteria counts and for micro-colonies, but does not influence the growth. White membranes are most popular for enumerating general bacteria. Gray membranes turn black when wet for facilitating the detection of yeast and molds.

Key Features

  • Certified Quality
  • Gamma irradiated, 25kGray
  • No enhancement or inhibition by the grid lines
Item Product Description Unit of Measure Price Purchase
White with black grid; high flow membrane Pack of 100
Buy 1 $63.69
Buy 10 $50.94
Contact customer service for ETA In Stock
Gray for yeast and molds Pack of 100
Buy 1 $63.69
Buy 10 $50.94
5 In Stock 5 In Stock

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