System for taking liquid samples from a fermenter, has sample probe having a filter membrane with a sterile limit material and a gas supply at sterile limit side

摘要

A system to take liquid samples, and especially from a fermenter, comprises a sample probe (3) with a filter membrane (5) which is inserted into the vessel (1) filled with the medium (2). A system to take liquid samples, and especially from a fermenter, comprises a sample probe (3) with a filter membrane (5) which is inserted into the vessel (1) filled with the medium (2). The sample is drawn through the filter membrane by underpressure into the sample extraction pipe (7), where the hydrophilic filter material is a sterile limit. A hydrophobic overpressure gas feed line (6) is at the membrane sterile limit side (5a), with a sterile filter (12) in the gas supply path.