Pumps For Precision Fluid Control

Ratio:Matic® pumps consist of two valveless pump heads direct coupled to a single variable speed drive, standardly a 23 frame stepper motor. The displacement of each pump head is independently adjustable, and a variety of sizes can be used in combinations to achieve dispensing ratios from 1:1 to 500:1. The design utilizes one moving part, a rotating and reciprocating ceramic piston to accomplish both pumping and valving functions without valves. The piston and mated liner are made of dimensionally stable, hard ceramics which ensure long term, drift-free accuracy of 1% or better.