1- Separation Scale
UF membrane pores are smaller than MF membrane pores. MF pore diameters have a range of 0.01 μm to 10 μm. UF pore sizes are rated by the molecular weight of retained substances with a molecular weight range of 1,000 to 100,000. The smaller (tighter) MF membrane pore sizes occasionally overlap the larger (more open) UF pores. However UF pores are generally smaller than MF pores.