The ProMinent® Sigma/ 2 is a mechanically-actuated diaphragm metering pump capable of flow rates from 5.2 to 38 gph (50 to 400 L/h) and pressures up to 174 PSI (12 bar) with a 2% precision. Metering pumps are programmable and display comprehensive data for monitoring, recording, and tracking. Functions include digital setting of stroke frequency, manual stroke length adjustment (0.5 % steps), variable speed. Used for chemical compound dosage. Body pump in PVDF.