Plug&Play 4 channels microfluidic flow controller

microfluidic pressure and flow control

Pressure stability: 0.005 % - Settling time: 40 ms - Response time: 9 ms

20 times more stable & up to 10 times faster than other microfluidic flow controllers

Elveflow® provides the only microfluidic flow control system using Piezo technology and enables a blazing fast flow change in your microdevice. The new OB1 MkII is designed to generate a stable and pulse-less flow while remaining extremely reactive. Control independently up to 4 channels, for a wide variety of challenging microfluidic applications (digital microfluidics, bead and particle manipulation, fast liquid sample switching..)


Microfluidic flow control application notes step by step

New OB1 MkII : Outstanding flow control performances

microfluidic pressure regulator flow control OB1

microfluidic flow controller response time

9ms response time*

Ultrafast flow control, snappier and more responsive experiments

microfluidic high accuracy flow control

0.005% Stability*

High precision flow control, rock solid performance

microfluidic plug and play software

Plug & play

USB control with Elveflow® Smart Interface

microfluidic compact flow control device


Keep performance and fast flow control wathever your sample volume

microfluidic flexible custom flow control  4 outlets


Mix the unit numbers you need with 3 different pressure ranges 200mbar, 2bar, 8bar

microfluidic control flow rate and pressure

Control both flow rate & pressure

Get advantages of pressure control and syringe pump

*See datasheet for more information

OB1 MkII pressure & flow control, microfluidic setup

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OB1 schema microfluidic pressure and flow control

1. Pressure supply

Connect a dry, dust and oil free pressure source to your instrument.

2. Monitoring

Control the pressure and flow rate using the Elveflow Smart Interface on your computer. This software enables you to create and run sequences with a specific pressure or flow rate profile.

3. Sample

Pressurize the liquids inside tanks with your OB1 MkII.

4. Chip

Pressurized liquids are smoothly and precisely injected into your chip according to the set pressure or flow rate profile.

Features and benefits

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Choose the number of independent channels on your OB1 MkII (from 1 to 4 channels). You can mix any maximum pressure range (200 mbar, 2 bar, 8 bar) on the same OB1 MkII.


4 independent channels on a small sized system (210 x 210 x 80 mm).

High stability

The OB1 MkII enables to get a flow standard deviation of 0.005% of the pressure range. The stability of piezoelectric technologies enables you to get the world most accurate flow control for your microfluidic experiment.

Short response time

Piezoelectric technologies used in the OB1 MkII enable flow changes in 9 ms in your microfluidic device. Get the world’s fastest response time for your microfluidic experiment.

Flow rate control

Each channel of your OB1 MkII pressure controller can be coupled with a flow sensor. Using our feedback loop, you can monitor and control flow rate in your microfluidic setup while keeping stability and responsiveness of pressure driven flows. Since flow rate connectors are supplied with all OB1 MkII , you can buy your flow sensors and upgrade your OB1 MkII at any time.

High compliance

Former electro-mechanical pressure controllers have limited gas throughput which limits their ability to quickly pressurize large tanks. The OB1 MkII technology enables fast pressurization of tanks up to 1 liter and enables you to setup long term or high flow rate microfluidic experiments.

Plug & play flow control

Using the Elveflow® Smart Interface you can switch from beginner to expert mode. The beginner mode enables you to control your setup after a few minutes of training. For more advanced experiments, switch to the expert mode to enjoy the full potential of your OB1 MkII .

Complex fluidic profiles

The OB1 MkII  enables a multitude of configurable pressure functions as sine, square, ramp… Coupled with flow sensors, the OB1 MkII  can generate the same fluidic functions in flow rate.

Complete setup synchronization

The OB1 MkII is equipped with internal & external trigger connectors. Your OB1 MkII  can thus be synchronized with any other Elveflow® product, a microscope or any electrical instrument. The Elveflow® Smart Interface enables the synchronization and triggering of up to 16 instruments simultaneously.

Full-custom pressure controller

The OB1 MkII  can be modified to fit almost all specific microfluidic requirements. Do not hesitate to contact us to get a quote for an OB1 MkII  that will exactly fit your needs.

Software Elveflow® Smart Interface

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USB pressure controller software module

microfluidic labview software usb

Elveflow® instruments are gathered around a software application which facilitates the switch from one instrument to another.




Thanks to an intuitive interface, the Elveflow® Smart Interface enables to use Elveflow® instruments from the simplest command for beginners to the most

complex manipulations for experts… read more

Control your experiments through Matlab®, Labview® or Elveflow® Smart Interface. Elveflow® Smart Interface is a software application offering all

the functionality that microfluidicists need.

Pressure control

The pressure can be easily adjusted for up to 4 independent channels.

Flow control

When used with a flow sensor, a feedback loop with adaptable sensors enables a direct control of the flow rate.


Store up to 4 different pressure configurations and switch from one to another in a second.

Display & save data

Real time pressure and flow rate are monitored and can be saved for later studies.

Edit functions

Complex pressure and flow rate profiles such as ramp, sine, square and triangle can be defined.

Elveflow® Smart Interface

When used with a flow sensor, a feedback loop with adaptable parasensors enables a direct control of the flow rate.

Product line & Specifications

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OB1 microfluidic pressure and flow control

The following table summarizes the main features of the Elveflow® OB1 MkII pressure controller. To provide quality & performance, all our instruments are

tested and calibrated independently (response time, stability, repeatability … ) and all result charts are stored.

You can create your own Elveflow® pressure controller using various options:

  • The OB1 MkII  pressure controller can be prepared with up to 4 independent pressure control units.
  • Each pressure outlet can be set with a specific maximum pressure range: 200 mbar, 2 bar, 8 bar.
  • Each outlet can be coupled with an additional flow meter.


click to enlarge

(1) Output stability measured at 150 mBar with an external High accuracy pressure sensor (Druck DPI150)

(2) Depending on user computer operating system

(3) Volume dependent – Measurement done on 12 mL tank for a set point from 0 to 200 mbar

Flow control stability measurement and comparaisons more informations

Responsiveness of flow control instruments more informations

According to Elveflow® product code convention, «OB1 MkII  200» stands for an Elveflow® pressure controller consisting in 4 units with 200 mbar of maximal output pressure. «OB1 MkII  Mix» means an Elveflow® pressure controller with mixed output pressures. Due to physical compliance of fluidic systems, performances can change from one setup to another.

Contact Elveflow® microfluidic experts for your particular setup needs.

Available options

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Microfluidic flow sensor microfluidic flow sensor option

Some microfluidics applications require knowledge and control of the transported fluid volume. Elveflow® enables both flow rate and pressure control by combining OB1 MkII

pressure controller with USB flow meter.  This option combines the advantages of syringe pumps with the reactivity of pressure controllers.

More details

Add & mix pressure range  flow sensor flow control pressure outlet

The OB1 MkII  pressure controller can be prepared with up to 4 independent pressure control units. Each pressure outlet can be set with a specific pressure range: 200mbar, 2bar, 8 bar.

For each outlet, get high accuracy liquid flow sensors for ultra low flow rate monitoring

Microfluidic Accessories & Kits Microfluidic Accessories & Kits

No more microfluidic plumbing issues with our Plug & Play coupling solutions! These Accesory Kits allow you to easily connect a pressure source or syringe pump to your setup, inject liquids into microfluidic devices,  and enhance the capabilities of your system.

More details



Video Flow focusing control

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Video description

The ultrafast pressure control technology developed by Elveflow® enables the real time tuning of complex focusing regime.

By simply choosing the type of pressure function (constant, ramp, sinusoidal, etc…) flow focusing, medium switching and chemistry on a chip become a child’s play with

the more stable performance on the market.

Related technological tips

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Benefit from the most recent technological advances

High accuracy pressure controller enables the generation and control of pressure into microfluidic chips. USB monitored apparatus enables to program and control your

experiment through Elveflow® software, Matlab, LabView. Our partnership with national instrument is the guarantee

of superior performance and reliable devices.

National instruments is our technological partner for embedded electronic

Elveflow microfluidic innovation center  powered by National instruments

Syringe pump or pressure controller?

Syringe pumps are extensively used for a lot of flow control applications but are sometimes poorly adapted to fluid handling in microfluidic circuits (read more). At low flow rate, syringe pumps lead to long

settling time and pulsing flow. To address this problem, ELVEFLOW offers high precision pressure controllers to obtain fast and accurate flow control in microfluidic devices.

Please ask our microfluidic specialists for advice on how to use our instruments, they will gladly counsel you on the best equipment set for your application.

For more technical or pricing information: or phone: +33(0).184.163.807

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