The STH and STQ Duplex metering pumps are designed for precision mixing, diluting, and proportional metering for OEM medical, analytical, and industrial instrumentation. The pumps consist of two FMI valveless pump heads direct coupled to a single variable stepper motor drive. The displacement of each pump head is independently adjustable, and a variety of pump head sizes can be used in combinations to achieve dispensing ratios from 1:1 up to 500:1 from microlitres to litres.
The pumps also feature FMI’s patented CeramPump® valveless piston pumping technology and are the valveless-syringe alternative to conventional syringe pumps. The CeramPump.. has only one moving part in the fluid path, a sapphire-hard ceramic piston, which accomplishes both pumping and valving functions, without valves.
The design eliminates the multiple syringes, valves, actuators, and drivers required by conventional syringe pumps for continuous fluid dispensing and metering. The manufacturer says the pumps will dispense millions of maintenance-free cycles at ±1% precision without recalibration. Fluid Metering, Inc.
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