IPS-13 vs IPS-14: Synchronized vs Independent Dual Channel Syringe Pumps Explained
Pump Selection Guide
IPS-13 vs IPS-14: Synchronized vs Independent Dual Channel Syringe Pumps Explained
Inovenso IPS Team · 7 min read · Product Comparison
Inovenso IPS Series · Dual Channel Syringe Pumps · Head to Head
IPS-13
Synchronized Dual Channel
1 Motor · Both Channels
Both channels always move together — same speed, same direction, same timing.
VS
IPS-14
Independent Dual Channel
2 Motors · Each Channel
Each channel runs independently — different rate, syringe, and direction simultaneously.
17.89 pL/minMin flow rate
Co-axial · GradientIPS-13 best for
Multi-fluid · SequentialIPS-14 best for
121.51 mL/minMax flow rate
The IPS-13 and IPS-14 are both dual-channel syringe pumps from Inovenso. They look nearly identical, share the same flow range, and cost similarly. But they are fundamentally different instruments — and choosing the wrong one can make your protocol impossible to run correctly.
Each channel has its own dedicated stepper motor. Each can run at a completely different flow rate, with a different syringe, in a different direction — simultaneously.
The IPS-13 uses a single stepper motor to drive both syringe pusher blocks. This means Channel A and Channel B always move together — same displacement, same timing, same flow rate.
This synchronization is not a limitation; for many applications, it is exactly what you want. Co-axial electrospinning is the classic example: the inner and outer needle solutions must be delivered simultaneously and consistently. Using one motor guarantees they stay in step.
Gradient mixing is another ideal use case. If you want to blend two solutions in a fixed ratio, the IPS-13 holds that ratio perfectly without any software coordination between two independent motors.
REF
Synchronized dual-pump coaxial electrospinning: Coaxial electrospinning requires two aligned nozzles to simultaneously pump two different solutions, resulting in the formation of core–shell fibers. Precise flow synchrony between channels is essential to maintain a compound Taylor cone — the key structure that determines fiber morphology in co-axial setups. — Coaxial Electrospinning: an overview, ScienceDirect Topics, 2024. sciencedirect.com/topics/engineering/coaxial-electrospinning
IPS-13 models available:IPS-13, IPS-13R, IPS-13S, IPS-13RS — infusion, withdrawal, and recipe save variants. All four operate on the same synchronized single-motor platform.
The IPS-14: Fully Independent Dual Channel
The IPS-14 has two separate stepper motors — one per channel. Each channel is completely autonomous. You can run Channel A at 10 µL/min infusion with a 10 mL syringe while Channel B runs at 500 µL/min withdrawal with a 50 mL syringe.
This level of independence opens protocols that are simply not possible on a synchronized pump. Drug-drug interaction studies, sequential fluid layering, competing reaction delivery, or any experiment where two fluids must be delivered at different rates or on different timelines.
REF
Independent channel control for coaxial flow rate engineering: In coaxial electrospinning, independent control of core-to-shell flow rate ratios directly determines shell layer thickness and drug release kinetics. Decreasing core-to-shell flow rate ratios slowed drug diffusion through thicker shell walls. This type of fine-grained ratio control requires two independently driven channels — synchronized pumps cannot achieve variable ratios. — Effects of Core-to-Shell Flowrate Ratios and Drug Loadings on in Vitro Releases from Electrospun PCL Core/Shell Microfibers, SSRN, 2025. papers.ssrn.com — Core-to-Shell Flowrate Ratios
REF
Independent flow control in organ-on-chip: Different organ-on-chip systems have fundamentally different flow rate requirements. Integrating multiple organ systems (e.g., lung-on-chip with heart-on-chip) requires pumps with independent channel control — a synchronized pump delivering both channels at the same rate would impose incorrect mechanical shear on one or both tissue models. — Practical Solutions for Organ-on-Chip Experimental Set-ups, Cellix, 2020. wearecellix.com — Organ-on-Chip Set-ups
IPS-14 models available:IPS-14, IPS-14R, IPS-14S, IPS-14RS — the same four-model structure as the IPS-13 series. The RS variant adds both withdrawal and recipe save/recall capability to Channel A and Channel B independently.
Core-shell fibers with different core-to-shell ratios
Drug-drug interaction delivery at different concentrations
Multi-fluid microfluidic and organ-on-chip setups
Simultaneous infusion and withdrawal
Reactions requiring two reagents at different rates
REF
Core-to-shell flow ratio effect on fiber diameter: In biodegradable core/shell electrospun fibers, the fiber diameter is controlled primarily by the core fluid flow rate (Qc). Scaling laws show that outer fiber diameter follows Df ∼ Qc0.02–0.30 depending on polymer system — confirming that independent core and shell flow rate control is the key variable in fiber geometry engineering. — Biodegradable Core/Shell Fibers by Coaxial Electrospinning: Processing, Fiber Characterization, and Its Application in Sustained Drug Release, ACS Macromolecules, 2010. pubs.acs.org — doi:10.1021/ma100423x
REF
Melt coaxial electrospinning — two independent pumps required: In melt coaxial electrospinning for phase change material encapsulation, two independent syringe pumps were used to separately control inner fluid (melt hydrocarbon PCM) and outer fluid (PVP/Ti(OiPr)₄ solution). Independent pump control was essential because the two fluids required different viscosities, temperatures, and feed rates to form a stable compound Taylor cone. — Core-Shell Nanofibers: Nano Channel and Capsule by Coaxial Electrospinning, IntechOpen. intechopen.com/chapters/8656
Quick Decision Guide
1
Do both channels always need to run at exactly the same flow rate and direction? → IPS-13
2
Do you need different flow rates, different syringes, or different directions on each channel simultaneously? → IPS-14
3
Are you running co-axial electrospinning or co-axial electrospraying? → IPS-13 (unless core and shell need different rates → IPS-14)
4
Is your protocol likely to evolve or become more complex? Need future flexibility? → IPS-14 gives more headroom
Frequently Asked Questions
What is the difference between the IPS-13 and IPS-14?
The core difference is motor architecture. The IPS-13 uses a single motor that drives both channels simultaneously — they always move at the same speed and direction. The IPS-14 uses two independent motors, one per channel, allowing each channel to run at a completely different flow rate, with a different syringe size, and even in a different direction at the same time.
Can the IPS-13 run channels at different flow rates?
No. Because the IPS-13 uses a single motor to drive both pusher blocks via the same drive train, both channels always advance at exactly the same rate. If you need different flow rates on each channel simultaneously, you need the IPS-14.
Which pump is correct for co-axial electrospinning?
For standard co-axial electrospinning where the core and shell solutions are delivered at the same flow rate, the IPS-13 is the ideal choice — its single-motor synchronization guarantees lockstep delivery and eliminates the risk of flow rate drift between channels. If your protocol requires a specific core-to-shell flow ratio (e.g., core at 0.5 mL/hr and shell at 1.5 mL/hr), use the IPS-14 with independent channel rates. Published coaxial electrospinning studies confirm that core-to-shell flow rate ratios directly determine shell layer thickness and drug release kinetics.
Can the IPS-14 do simultaneous infusion and withdrawal?
Yes — on the IPS-14R and IPS-14RS variants, each channel can independently run in either infusion or withdrawal mode. This means you can infuse through Channel A while withdrawing through Channel B at a completely different rate simultaneously. This is particularly useful for push-pull perfusion systems and continuous flow organ-on-chip setups.
Is the IPS-14 always the better choice if I can afford it?
Not necessarily. For applications that genuinely require synchronized delivery — co-axial electrospinning at a fixed 1:1 ratio, gradient mixing, or parallel dosing — the IPS-13’s single-motor design is actually more reliable. There is no risk of inter-motor drift or timing offset between channels. The IPS-14 is the better choice when your protocol requires different flow conditions per channel, or when flexibility for future protocol variations is a priority.
What are the IPS-13S and IPS-14S variants?
The S suffix denotes the recipe save/recall capability. IPS-13S and IPS-14S can store multi-step flow programs (ramp up, hold at rate, ramp down, pause) that can be saved and recalled — useful for standardized protocols that need to be reproduced across multiple runs or operators. The RS suffix combines both withdrawal (R) and recipe save (S) capabilities in one unit.
Compare IPS-13 and IPS-14 Side by Side
Full specifications, model variants, datasheets, and store links for both series.
