Micro filter is composed of housing and filter cartridge, and designed to filter floating substance in water (to improve turbidity). Features of this equipment is variable capacity from 0.2 to 250 micron by the selection filter cartridge compared to 20 ~ 50 microns of conventional filtration system. In addition, cleaning and back washing is not needed, and waste water is not produced correspondingly. For the same size, it shows higher processing capacity. In addition, housing is made of stainless steel, and filter cartridge utilizes polymer resin (acrylic or polypropylene). Therefore secondary contamination from filter is not available. It is usually used in pre-treatment of pure water production for semiconductor, pharmaceutical, beverage, food industries.