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Vacuum filtration is one of the most common applications used for sample preparation in chemistry, microbiology, waste water control and other analytical processes. The new ME1 and ME1C diaphragm pumps offer a compact, high performance and easyto- use solution which is perfect for both single and multiple filtrations. These new pumps provide a well-proven and extraordinary long diaphragm life time of 10,000-15,000 operating hours. They are whisper quiet with low vibration. The functional, space saving and innovative design with readily accessible top mounted power switch ensures convenient and quick operation. Both models feature robust PTFE diaphragms and valves for optimal chemical resistance. The ME1C features a full fluoropolymer flowpath, for a complete chemistry-design pump. An optional vent control valve with dial gauge enables variable fine adjustment of the pumping speed. Not intended for pressure filtration.