Microfluidic Flow Controller

Microfluidic Flow Controller
The OB1-MK3+ is a high performance microfluidic pressure and flow controller. Customize your unit: pick the number of channels you like and choose for each of them the pressure and vacuum ranges among the 5 options available.

Based on our high accuracy OB1 flow controllers, this all-in-one solution contains all the required parts for researchers to set up their own alginate beads generation system out of the box. It brings the many benefits of microfluidics, including excellent monodispersitysphericality, reproducibility, and high throughput compared to other hydrogel particle production techniques.


⇒Use pressure to accurately push and pull liquid


⇒Pair it with a flow sensor for accurate volume control


⇒We offer unrivalled flow regulation in terms of accuracy and responsiveness


⇒From one to four channels, 5 pressure & vacuum ranges available



Cutting-edge Microfluidic Flow Controller

Don’t be limited by instrumentations for your microfluidic experiments! Designed by scientists for scientists, the versatile and powerful OB1 MK3+ pressure controller allows perfect flow control for all kind of applications.
Whether you need pressure or vacuum, low flow rate or high flow rate, short experiments or week-long processes, the OB1 MK3+ is the perfect companion for your microfluidic research.

Customizable & upgradable: 1 Module, up to 4 channels, 5 pressure  & vacuum ranges available

The OB1 MK3+ can be configured, and upgraded at a later date, in any way you want, with up to 4 pressure and/or vacuum channels (and more as custom) on one piece of equipment.


Fastest flow rate control when paired with a flow sensor

You can connect a standard liquid flow rate sensor (MFS)or our premium Coriolis flow sensor (BFS, suited to both liquid and gas) to your OB1 MK3+  to control directly the flow rate in your chip. The system continuously calculates the pressure to apply in order to maintain the desired flow rate.


Full control software & SDK

A single and intuitive software to get started in a few clicks and further automate the most complex and long lasting experiments. The SDK libraries to control the OB1 MK3+ with your own code and involve third parties instrument are also available.


OEM version available

The OB1 MK3+ can be used on a bench setup and also embedded in your own product. Elveflow has a solution for every step of your research & development.  Discover our OB1 MK3+ OEM solution.



  • Droplet microfluidics
  • Microfluidic Alginate Bead generation
  • Flow Chemistry
  • Polymer synthesis
  • Cell culture: cell perfusion
  • Mixing & sequential injection
  • Organ on a Chip
  • Droplet-sequencing : RNA sequencing
  • Lab on a chip
  • Enhance oil recovery


Technical Specifications

The table summarizes the main specifications of the Elveflow® OB1 MK3+ pressure controller. To provide quality & performance, all of our instruments are tested and calibrated independently (response time, stability, repeatability… ) after being assembled and all test results are kept.

Microfluidic flow controller


ESI is Elveflow’s dedicated software interface, built to make experimenter’s life better. It is perfectly adapted from your simple setups control to very advanced setups and workflows automation. It integrates several modules that make time-consuming and painful tasks so simple. It comes with SDK libraries to control Elveflow system from your own code.

The OB1 control window allows to:

  • Visualize the key parameters of each channel:
    • the command pressure
    • the output pressure
  • Visualize sensor output when one is connected to the OB1  (a flow rate sensor on the first channel in the screenshot presented below)
  • Set any pressure or flow rate pattern (predefined or custom)
  • Easily switch in flow rate control mode (sensor mode)
  • Use the pause/play button to preset the parameters on each channel and launch them simultaneously
  • Save configurations to gain time in the future or automate your workflow thanks to the sequencer
  • Open a graph to visualize and save data
  • Launch and use dedicated modules to simplify specific experimental tasks