Filter Diameter & Effective Filtration Area (EFA)

The physical size of the housing dictates how much liquid can be processed efficiently before the membrane saturates.

• 13 mm Diameter: Designed for small sample volumes (<10 mL). It maximizes sample economy by keeping the hold-up volume low.

• 25 mm / 30 mm / 33 mm Diameter: Optimized for larger batches (10 mL to 100+ mL). The larger effective filtration area speeds up processing and resists clogging, though it introduces a higher fluid retention volume.