Q3-40 Microbial Filtration Test System works on the membrane filtration principle. The system combines filtration assembly and vacuum pump into one compact and lightweight all-in-one unit. Its built-in water and air dual-purpose pump generates suction for filtration. Traditional suction bottles are no longer required, and waste liquid can be discharged directly. Every filter head is fitted with a touch button with indicator light for individual control, so users can easily check the working status of each channel.