Bronkhorst flow sensor - BFS

Premium Coriolis flow sensor

The Rolls-royce of flow sensors

High accuracy microfluidic flow sensor

Unmatched up to 0.2% accuracy (2% for our standard BF1)

Broad flow rate range

Measure from uL/min to mL/min using one sensor

Compatible with liquid and gas

Straightforward compatibility without calibration

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Features & benefits

Specifically designed to suit microfluidic requirements, this flow rate sensor is based on the Coriolis principle. Its features make it the best and smartest solution for microfluidics applications:

Extremely wide flow rate range
High accuracy
Direct mass flow measurement, independent of fluid properties
Non-invasive measurement
Additional density and temperature outputs
Bi-directional measurement
Fast response

FLOW RATE CONTROL:

You can achieve flow control of your experiment by combining the Coriolis Flow Sensor with our pressure controller systems (OB1, COBALT). The Elveflow ESI software automatically adjusts the pressure to reach the required flow rate. Researchers who want to monitor the flow rate from their third party fluid driver can plug the flow sensor directly onto the computer.

BFS coriolis flow sensor

Cost-effective solution: one sensor’s operating range covers the ranges of several standard microfluidic sensors.
No calibration required
Stand alone sensor: plug the sensor directly to your computer to measure the flow rate.
Excellent repeatability and long-term stability
Excellent accuracy: down to 0.2 % of measured value accuracy
Easy to install and use
Low risk of gas bubble inclusion

Related application notes:

Typical fields of application include:

Solar cell and FDP technology
Food and pharmaceutical industries
Medical microchemical or analytical installations
Calibration laboratoriesCoumpound semiconductor processing
And many more…

Elveflow offers different Premium Coriolis Flow Rate Sensors, which vary by their operating flow rate range. The following table sums up the main features of the different sensors:

Specifications BFS (1) Guaranteed at constant temperature and for unchanging process and environment conditions.

(2) Depends on flow rate, heat capacity fluid, T amb., T fluid and cooling capacity.

(3) To be rigidly bolted to a stiff and heavy mass or construction for guaranteed stability. External shocks or vibrations should be avoided.

Is it possible to get a calibration certificate?

Absolutely, the BFS1+, BFS2 and BFS3, are individually calibrated by Bronkhorst before shipping. We provide the calibration certificate of these sensors.

Do I need an OB1 Pressure controller or a Sensor Reader to interface with my BFS?

No, the Bronkhorst flow sensor is directly connected to your PC by USB. Make sure you have a sufficient number of USB ports available or use an USB hub.

Thanks to an intuitive interface, the Elveflow® Smart Interface allows you to use Elveflow® instruments from the simplest commands for beginners to the most complex manipulations for experts… read more

Software features concerning the Coriolis flow rate sensor:

Intuitive display and measurement recording
Customizable flow rate control: adjust the flow rate control parameters to best fit your application’s needs. Whether you prefer a reactive or smooth flow rate change, our software allows you to adjust the feedback parameters.
Multiple predefined flow patterns (ramp, sinus, square or triangle signal)
Additional features are available like: dispensed volume calculation, customizable resolution, tuning of the setup fluidic parameters (coupled with our OB1 flow controller), multiple channel flow rate control using one flow sensor (advanced feature).

Control your experiments through C++, Python, MATLAB®, LabVIEW® or the Elveflow® Smart Interface. The Elveflow® Smart Interface is a software application offering all the functionalities that microfluidicists need.

INtuitive measurement AND display

Multiple flow patterns available + custom flow rate control possibility

easily switch between multiple measurement parameters (Temperature, Mass flow rate, Density)

How does a Coriolis flow meter work?

A microfluidic Coriolis flow sensor contains a U-shaped loop which constantly vibrates. When a fluid flows through this vibrating loop, Coriolis forces are generated and bend or twist the tube. The extremely small tube displacements are detected by sensors and fed to the electronic board. Since the measured phase shift is proportional to the mass flow, the Coriolis flow rate sensor measures the mass flow directly. This measurement principle is very accurate, fast and, more importantly, independent of the properties of the fluid (density, temperature, viscosity, pressure, heat-capacity or conductivity).

WHICH Flow Rate Sensor SHOULD YOU CHOOSE?

Elveflow offers two types of flow rate sensors: one based on thermal conductivity technology (Microfluidic Flow Sensor) and one based on Coriolis principles (Bronkhorst Flow Sensor). Both sensors have pros and cons that we have summarized in the table below. This table helps you choose your sensors depending on your application and your budget.

Technical comparison between Coriolis flow sensor and thermal flow sensor dedicated to Microfluidics

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Software

A free software for all instruments

Powerful, modular and versatile set-up control solution

The ESI software can control up to 16 Instruments through the same interface. Thanks to TTL triggers you can synchronize your Elveflow system with any other instrument used in your laboratory (microscope or any electrical instrument … ). The Scheduler is a user-friendly tool to automate complex steps of your experiments and protocols.

Volume
Injection
module

Enter your targeted volume and this module will automatically adjust the flow rate at the right time to inject it.

Fluidic system optimization module

Automatic diagnostic of the fluidic path sizing and recommendations to improve your microfluidic setup.

Bubble
detection
module

Do not suffer anymore because of bubbles!

Sensor calibration module

Don’t lose precious time in calibration protocols.

Products and associated accessories

OB1 MK4

Microfluidic Flow Controller

1 to 4 channels pressure & vacuum microfluidic flow controller

COBALT

Autonomous microfluidic pump

Standalone and autonomous pressure or vacuum controller

Microfluidic flow sensor - MFS

Microfluidic flow sensor

Thermal flow rate sensor

Cell & biology pack

Live cell perfusion pack

Liquid handling for cell-based experiments

Need help or advice?

For any help to determine what microfluidic instruments you need, you can contact us!
Our experts will help you build the best microfluidic setup for your application, with our state-of-the-art microfluidic line.