Each tube track can operate with different tube diameters to let a fixed ratio be pumped between two fluids. The inherent-metering pump, with a 99.5% repeatability, performs dosing, metering, or evacuation duties. An adjustable occlusion lets users adjust the track to deliver the required pressure (pumps with preset occlusion are also available).

Watson-Marlow Bredel, 37 Upton Technology Park, Wilmington, MA 01887, (800) 282-8823, watson-marlow.com