Flownamics Seg-Flow, Seg-Flow S3, and SampleMod: How They Differ

Flownamics builds automated sampling and bioprocess automation hardware, and its product names overlap enough to cause confusion. The short version: Seg-Flow is the core automated sampling system built on the company's patented Segmented Sampling Technology; Seg-Flow S3 is the current generation of that sampler with a more graphical interface for monitoring and scheduling; SampleMod is a fraction-collection and sample-handling module that pairs with a Seg-Flow S3 and an analytical instrument such as the Agilent 1260 Infinity II Online LC. If you need sterile, cell-free samples pulled from a bioreactor on a schedule, you are looking at the Seg-Flow line. If you need those samples routed into an online LC or fraction collector, SampleMod is the piece that makes that connection.

The three products at a glance

Seg-Flow: the base sampling platform

Flownamics states it developed and released the first-generation Seg-Flow sampling system after observing a need for greater process consistency. The system uses Segmented Sampling Technology to provide a small, precise sample of your process in a minimum amount of time.

That description matters for two reasons. First, sample size and cycle time are the practical constraints in automated bioreactor sampling — you want enough volume for the downstream analyzer without pulling more from the reactor than necessary. Second, the company positions the platform across upstream small-scale R&D reactors and downstream production and purification, so the same sampling approach is intended to scale across process stages rather than being a benchtop-only tool.

Seg-Flow S3: same sampling, better visibility

The S3 is described as offering a more graphical interface, with monitoring and scheduling made more intuitive. The stated benefit is operational: you can see where the sampling cycle is and what reagent levels are with a glance.

If you are choosing between generations, that is the trade-off to weigh — not a different sampling principle, but how much time your team spends checking system state. For labs running unattended overnight sampling or managing several reactors, at-a-glance cycle and reagent status is the feature that reduces failed runs.

SampleMod: the analytical bridge

SampleMod appears in the context of a specific combination: the Agilent 1260 Infinity II Online LC together with Flownamics SegFlow S3 and SampleMod. Flownamics also references a performance evaluation of its sampling devices for the Agilent Online LC.

So SampleMod is not a standalone sampler. It is the module you add when the goal is online LC analysis rather than simply collecting samples. The decision rule is straightforward:

• Collect samples for later offline analysis → Seg-Flow / Seg-Flow S3
• Feed samples directly into an online LC → Seg-Flow S3 + SampleMod + the Agilent 1260 Infinity II Online LC

Where Seg-Flow PS fits

Seg-Flow PS is called out separately for low shear, which Flownamics says makes it ideally suited to cell and gene therapy applications. Shear sensitivity is the reason this variant exists: cells and cell-based products can be damaged by aggressive sampling, so a low-shear path protects sample integrity. If your process involves intact cells or shear-sensitive material, this is the variant to ask about rather than the standard Seg-Flow.

Adjacent capabilities worth knowing

Flownamics also lists feeding and analytical integration products that sit alongside the sampling line:

• Automated feeding from one stock solution to up to six bioreactors, managed by a compact single-use syringe pump platform
• A sampling probe for the Sartorius Ambr 250 Modular Vessel that allows withdrawal of sterile, cell-free samples
• Raman integration, enabling a preferred Raman platform to interface with cell-containing and cell-free samples from a bioreactor
• Vi-CELL BLU integration with Seg-Flow S3, creating a fully automated on-line system for cell viability and counting across up to 8 bioreactors
• A Peltier cooling device with two temperature zones holding sample racks at a specified temperature down to 0°C
• A compact liquid handler and an automated sampler with a fully integrated fraction collector, both described as industry firsts

These matter for product selection because they determine whether a Seg-Flow purchase solves your whole workflow or only the sampling step. Viability counting, Raman interfacing, and cooled sample storage each change what you need to buy.

How to decide

Ask three questions in order:

1. What happens to the sample after it is drawn? Offline analysis points to Seg-Flow or Seg-Flow S3. Online LC points to Seg-Flow S3 plus SampleMod.
2. Is the sample shear-sensitive? If yes, look at Seg-Flow PS rather than the standard configuration.
3. Do you need viability, Raman, or cooled storage in the same loop? Each has its own integration, and the S3 is the generation named in the Vi-CELL BLU and SampleMod combinations.

Flownamics offers virtual demos and lists conference and webinar appearances, including a January 29, 2026 webinar titled "From Bioreactor to Analyzer" — a reasonable place to see the sampling-to-analyzer path demonstrated before committing to a configuration.