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Laboratory syringe pumps: how can a precise, continuous flow be delivered with a syringe?

Indispensable whenever a liquid must be dispensed with precision and impeccable flow stability, syringe pumps advance the plunger via a stepper motor. In microfluidics, cell culture, flow chemistry or materials testing, they provide fine control from a few µL/min up to several mL/min. Single- or multi-channel, infusion/withdrawal, programmable profiles, USB/RS-232/Ethernet communications and GLP traceability: each configuration delivers reproducible runs with smooth, pulse-free flow, compatible with syringes in glass, stainless steel or plastic depending on the solvent.

What are the different types of syringe pumps and how do you choose the right one?

Hidden behind the carriage, lead screw and stepper motor is a rock-steady liquid delivery. Single-channel models cover most R&D needs, while multi-channel syringe pumps synchronise several channels for mixtures, simple gradients or co-perfusion. Microfluidic versions fine-tune microstepping, gear reduction and backlash compensation to achieve ultra-low flow rates (µL/min) with minimal drift. For viscous fluids or pressurised microreactors, high-pressure models deliver higher force and accept stainless-steel syringes. OEM modules integrate neatly into automated test rigs.

In which fields is a syringe pump used?

• Life sciences: perfusion of cell cultures 2D/3D, organoids and organ-on-chip systems, maintaining a stable laminar flow for real-time imaging.
• Pharma/biotech: micro-formulation, encapsulation, enzyme kinetics, generation of nanoparticles by micromixing, ADME assays on chips.
• Chemistry/flow chemistry: precise delivery of reagents into microreactors, rapid reactions, condition screening, controlled polymerisations.
• Environment: membrane testing, constant-flow sampling, transport studies in porous media.
• Agro/cosmetics: controlled deposition, fine emulsions, electrospinning of fibres.
• Quality control and metrology: calibration of flow/pressure sensors, tests on solvent-sensitive materials.

Our syringe pumps are not intended for medical procedures; they are designed for R&D and laboratory control.

The different types of syringe pumps available

Frequently asked questions about laboratory syringe pumps

How do I choose my syringe pump?
: Specify by minimum/maximum flow rate, required accuracy, force/pressure, number of channels, solvent compatibility, and interfaces (USB/RS-232/Ethernet).

What accuracy can I expect?
: Typically ±1 % of the programmed volume and CV < 0.5 % on precision models. It depends on syringe internal diameter, viscosity, and proper calibration.

Which syringes should I use?
: Glass/PTFE for aggressive solvents, stainless steel for high pressure/viscosity, sterile polypropylene for bio. The internal diameter dictates resolution and maximum allowable pressure.

Can it infuse and withdraw?
: Yes, most support infusion/withdrawal. For near-continuous flow, use two channels in alternation or bypass valves.

Is the flow pulse-free?
: Micro-stepping delivers a very smooth flow. For ultra-stability, combine mechanical reduction, a large-volume syringe, and an in-line pulsation damper.

How do I manage pressure and safety?
: Monitor pressure (sensor/alarm), limit motor force, add an over-pressure relief valve, and respect the allowable pressure of the syringe and the fluid path.

What maintenance is needed?
: Clean the lead screw and carriage, check the clamps, update the firmware, calibrate periodically, and shield the mechanism from solvent vapours.