Grundfos says its DSS uses an intelligent drive and microprocessor controller to ensure that each dose is performed precisely and with low pulsation, even with chemicals of high-viscosity or off-gassing properties.
Packaged skid systems are available for all models of Grundfos hydraulically- and mechanically-actuated metering pumps including SMART Digital Dosing pumps with stepper motor technology offering up to 3000:1 flow turndown.
These dosing systems accommodate a broad scope of chemicals including sodium hypochlorite, sodium bisulfite, alum, potassium permanganate, sodium hydroxide, acids and anti-scalants.
The Grundfos Dosing Skid System (DSS).
Source:
http://www.worldpumps.com/view/43922/prepackaged-dosing-systems-from-grundfos-offer-accuracy-and-customization/