Sterile, mesh membrane filters are widely used for routine microbiological quality control because of the benefits they offer. Membrane filters are ready to use, and each filter is packaged individually, providing the highest safety while saving preparation time. Each individual envelope is marked with a filter identification and a batch number.

Membrane filters are available in different pore sizes and in three different types of materials. Cellulose nitrate filters (mixed cellulose ester) contain a mixture of cellulose nitrate and cellulose acetate, a material that ensures effective retention in combination with high flow and optimal colony growth. Cellulose acetate combines high flow rate and thermal stability with very low adsorption characteristics. Different filter colors provide the best possible contrast to colonies for easy and reliable quantification and identification.

FEATURES:

• 0.45 µm according to ISO 7704
• high flow membranes are available
• three different colors
• different pore sizes
• certified quality
• gamma irradiated at 25 kGray
• membrane filters comply with the following standards: ISO 7704, ISO 7899-2, ISO 8199, ISO 9308-1 and EN 12780