The Sterisart NF sterility units from Sartorius AG are compact, closed systems for sterile sampling. The Sterisart NF systems with Septum enable sterile sampling during incubation and provide a sterile barrier between the interior and exterior of the container thereafter. The consumables for sterility tests include a completely closed system for the sterility testing of open and closed containers, pre-filled syringes, powders, medical devices, etc. It is based on the membrane filter method, and eliminates the procedure of manipulating the filters. A peristaltic pump transfers the sample into the filtration units, and after rinsing, the filtration units are filled with culture media and used for incubation of the filters without any contact to the environment.