Used Fluid Metering FMI QG-6 Lab Pump with RH00 Low-Flow Head

Ultra Low-Flow Valveless Piston Pump for Precision Micro-Dosing (1.92 mL/min)

Achieve exceptional micro-dosing precision in your laboratory or analytical systems without overextending your equipment budget. The pre-owned Fluid Metering (FMI) QG-6 Low-Speed CeramPump, paired with the miniature RH00 RH-Series Pump Head, is engineered specifically for tightly controlled, sub-milliliter-per-minute fluid metering.

By sourcing this fully tested, used FMI metering system through HiTechTrader, research facilities, system integrators, and analytical chemists can secure drift-free, pulsation-free micro-dosing for critical reagent feeds and micro-reactor workflows at a fraction of the cost of buying new.

Condition & Unit Details

• Condition: Fully inspected, used low-speed metering pump in excellent working condition.

• Testing: Powered on, 6 rpm drive mechanism and stroke adjustment scale fully tested for smooth, bidirectional operation by our technicians.

• Included Components: FMI QG-6 Low-Speed Drive module (1/4" Shaft) and RH00 RH-Series Low-Flow Pump Head.

• The HiTechTrader Guarantee: Backed by our standard 30-day limited warranty. We have been a trusted provider of high-quality used laboratory and scientific equipment since 1982.

CeramPump Valveless Technology for Drift-Free Metering

Traditional metering pumps rely on check valves that can easily clog or fail, making them notoriously unreliable for ultra low-flow applications. Built on FMI’s proprietary CeramPump® technology, this system uses a single precision ceramic piston moving inside a matched ceramic cylinder to displace fluid without check valves or bypass systems.

This design eliminates the mechanical drift and pulsation common in diaphragm pumps, ensuring a highly stable flow over millions of operating cycles with a typical accuracy better than ±1% and a Coefficient of Variation (CV) of ≈ 0.5% or better.

Ultra Low-Flow Range & "10-0-10" Precision Control

The QG-6 drive platform is optimized specifically for ultra-low-flow operations where very fine resolution is required. Operating at a nominal drive speed of just 6 rpm, this ultra-slow rotary/reciprocating motion provides incredibly fine resolution.

When paired with the RH00 miniature pump head, the system delivers a maximum flow rate of approximately 1.92 mL/min at 100% stroke. Flow is infinitely adjustable from zero to the maximum using the Q-series “10-0-10” stroke control scale. Because the design is fully reversible, operators can seamlessly change the flow direction by simply adjusting the stroke control across the zero point on the scale.

RH00 Pump Head for Extreme Chemical Compatibility

The RH00 belongs to the FMI RH-series miniature pump head family. The wetted materials—including the ceramic piston/cylinder and the PVDF or fluoropolymer pump body—provide broad compatibility with aggressive chemicals and high-purity analytical fluids. Designed to safely handle system pressures up to 75 psig and temperatures up to 212 °C (depending on the exact body material), this robust flow path is ideal for demanding analytical environments.

Furthermore, the standard 1/4-inch shaft allows for straightforward coupling and integration into tight OEM spaces, pilot-scale systems, and analytical instruments.

Technical Specifications

Nationwide Shipping & Availability

Waiting on long OEM lead times for highly specific micro-dosing pumps can stall your analytical method development. Operating out of our primary facility in Coatesville, Pennsylvania, HiTechTrader provides rapid, secure shipping to research institutions, pharmaceutical labs, and industrial OEM builders nationwide.

Whether your facility is located locally on the East Coast, in major tech and biotech hubs like Texas, or anywhere across the globe, we ensure your used fluid processing equipment arrives safely and ready for immediate deployment.

Frequently Asked Questions (FAQ)

Why use a metering pump that only spins at 6 rpm?

The FMI QG-6 is specifically engineered with a fixed 6 rpm low-speed drive to deliver exceptionally fine resolution at ultra-low flow rates. By moving the piston very slowly, the pump eliminates the overshoot and pulsation common in high-speed pumps, making it perfect for critical micro-reactor work and analytical sampling where sub-mL/min precision is absolutely required.

What does the FMI "10-0-10" scale do?

The "10-0-10" linear flow control scale allows operators to infinitely adjust the piston's stroke length. Setting the scale to "10" delivers maximum flow (approx. 1.92 mL/min), while setting it closer to "0" delivers micro-liter flows. Moving the indicator past the "0" mark to the other side of the scale seamlessly reverses the fluid direction without having to stop the pump or swap tubing.

What fluids can the FMI RH00 pump head handle?

The RH00 pump head features a completely nonmetallic fluid path, typically utilizing a PVDF or similar fluoropolymer body paired with a ceramic piston and cylinder. This construction provides exceptional chemical resistance, allowing it to safely dose aggressive industrial solvents, harsh acids, and high-purity analytical reagents.

Buy the Used FMI QG-6 Lab Pump with RH00 Head

HiTechTrader offers the pre-owned Fluid Metering Inc. QG-6 Ultra Low-Flow Valveless Piston Pump with the RH00 RH-Series Pump Head, providing laboratories and OEM system integrators with a reliable solution for precision micro-dosing and analytical fluid control.

Contact HiTechTrader today to:

• Request pricing

• Confirm exact port connections, fluoropolymer body materials, and tubing compatibility

• Discuss expedited shipping options to minimize your lab's downtime