Midisart® and Minisart® HY for air | gas filtration. For the sterilisation and removal of particles from air and other gases, filtration with PTFE membranes is the optimal solution. Typical applications are the sterile venting of containers, fermenters and tubing systems in medical devices. The 100% hydrophobic character of the membrane ensures the availability of the entire filtration area at any time. Minisart® syringe filters can be used bi-directional for the air | gas filtration.