The MFS mass flow generator is capable of generating and maintaining set flow rates within 2% of full scale. The MFS is available in two standard configurations for flow ranges of 25-2000 and 50-4500 ml/min. Compared to typical pump and mass flow control valve arrangements, it is quieter and uses less power without sacrificing accuracy or stability. The MFS is suitable for use as a primary flow generator for respirometry systems or any application that needs a regulated flow.