Traditional ATF with STR/SUB connects to HFF on top of diaphragm pump - series 32
Not more traditional than STR/SUB can be a modern Perfusion-Bioreactor
Shown 3 and 6 liter traditional P-SUBs with Magnetic-Bottom-Drive, Thalia LASER guided diaphragm A-SUP connected to TC type HFF. The SUB suction deep-tube connects via a hose to the standard HFF top at feed side and opposite to the A-SUP. The A-SUP is mounted on a foot, and underneath Thalia the red LASER sensor for real-time measuring the position of the free floating diaphragm and hereby full control of velocity and selected exchange volume.
Check out P-SUB product matrix under support