ProMinent motor driven metering pumps are built to last with robust gearboxes, chemical resistant housings and electronic control. The capacity of the Sigma and Hydro range is from 1 – 1000 L/hr. They can be manually or remotely actuated from a 4-20mA or pulse signal and have feedback signals such as fault and low chemical. Chemical metering applications could include alum, polymer, soda ash, caustic or acid dosing for water treatment applications. The complete range of pumps can be viewed in the Prominent yellow pages catalogue at our Downloads page.