Safety system for control of a filter.

摘要

Safety system for controlling a filter (10) with an inlet (11) and an outlet (12) for the liquid which is to be filtered and an outlet (13) for the filtrate. The filter (10) is arranged between a liquid treating system (1-9) and a sterile system (18-23) adapted to receive the treated and filtered liquid. A recirculation circuit (14) is arranged in parallel with the filter (10) and connected to the first mentioned inlet (11) and outlet (12) and has means (16, 17) for the supply of an indicator which is not normally allowed passage through the filter (10). The system further includes a detector (19) for the filtrate, disposed after the outlet (13) for the filtrate, said detector sensing if the indicator has nevertheless been allowed to pass together with the filtrate into the sterile system (18-23). Preferably the safety system is intended to be used in connection with a hemofiltration system.