Sartorius Stedim Biotech Microsart @vance colony counter

The Biotech Microsart @vance colony counter has been specifically designed for microbiological quality control in the pharmaceutical and biopharmaceutical industries. The latest addition to the Microsart range is the single-use filter units, @filter 100 and 250.

Just a few steps are all it takes to go from sampling to incubation using Microsart @filter and obtaining reliable analytical results. The filter units are sterile-packaged, ready to connect ‘out of the box’ in the quality-assurance laboratory. Due to the optimised design of the filter unit, the entire sample is filtered, without any liquid retained on the funnel walls. This eliminates the need for rinsing after filtration, unless required by specific regulations.

The filter and funnel form an all-in-one sterile unit and thus minimise the risk of secondary contamination. The cellulose nitrate membrane combines effective retention of microorganisms with high flow rates and optimal colony growth. Its printed grid facilitates colony counting, especially in the case of micro colonies and relatively high numbers of colony-forming units.

Microbiological analysis using Microsart @filter is easy: after samples are taken, the sterile filter unit is removed from the package and attached to a filter station. The transparent filter units with graduated marks on their funnels enable users to readily check the filling volume and the progress of filtration. The Click-Fit closure on the filter unit can be easily opened and the funnel quickly removed. In addition, the membrane can be conveniently removed as the filter base has notches for the forceps.

After filtration, the membrane filter is placed on a petri dish with an agar culture medium that is specifically formulated for the detection of microorganisms. Microsart @filter products are suitable for sample volumes of up to 100 and 250 mL and their membranes are available in a choice of pore sizes, grids (for counting) and filter colours.