Testimonials

Rob WardInterview of Dr. Rob Ward (personal web page) about the ELVEFLOW pressure controller products line:

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“Elveflow provided an excellent solution to our problem, which was how to tightly control minute flows in multiple microfluidic channels.”

For what purpose did you use the instrument? / For which applications?

“We study multi­‐particle interactions using microfluidics in conjunction with optical tweezers. We required precise control of multiple connected microfluidics channels thus pressure control alone was not sufficient; Elveflow’s new flow controllers provided the precise control we were looking for.”

What kind of experiments have you conducted using our machine?

“We have performed very slow flow rate and oscillatory flow experiments using solutions containing silica and polystyrene beads.”

In your opinion, what are the Elveflow instrument’s advantages?

“The Elveflow suite of instruments provides unique solutions to the problems many researchers face when working with microfluidics. Elveflow instruments offer superb flow and pressure control over a wide range or pressures. This includes positive and negative pressures, and pressure from 0 to 8 bar.”

Overall, how satisfied are you with our equipment?

“We have had some issues with the current software, however Elveflow’s support has been excellent and software development is continuing.”

Interview from 7 Oct 2013 about AF1, AF1 Dual, MUX, OB1 and Flow Sensors used since Feb 2012.

Ravi Sinha

Interview of Ravi Sinha
(personal web page) about the ELVEFLOW pressure controller products line:

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“I use the ElveflowAF1 dual pressure and vacuum generator. I use it to cyclically vary the air pressure under a membrane on which cells are cultured. Earlier I was using a syringe pump to do this. I am interested in the strains generated in the membrane, which are proportional to the pressure applied to it. With the syringe pump I could only approximate the pressures from the initial and final volumes, but not measure them. Also, the syringe pump was susceptible to pressure build up or leakage as it just kept pushing air in and out without worrying about the pressure. The AF1 unit allows me to apply a known pressure profile and directly controls the pressure, thus compensating for any air build up or leakage. The good fit for my need and the ease of use convinced me to get the Elveflow AF1 system.”

For what purpose did you use the instrument? / For which applications?

I am developing a device to study the effects on cells of combinations of surface strains and fluid flow shear stresses. For exposing cells to surface strains, I let the cells attach to a thin elastic membrane and then cyclically stretch the membrane using air pressure, for which I use the AF1 dual pressure and vacuum generator.

What kind of experiments have you conducted using our machine?

“I have applied fixed pressures using the AF1 and calibrated the corresponding strains generated in the membrane in my setup. And I have applied cyclically varying pressures to generate cyclically varying strain profiles.”

What are its advantages?

“For my work, the ability to apply varying known pressures is very important. The AF1 does it very well and it is easy to use. The ability to apply pressure and vacuum from the same port is really useful and allows me to apply various pressure profiles.”

Overall, how satisfied are you with our equipment?

“The AF1 does very well what it claims to do and fits my need quite perfectly. So I am very satisfied with it.”

Interview from 11 Apr 2014 .

Marie Frenea-Robin_lightInterview of Dr. Marie Robin (personal web page) about the ELVEFLOW pressure controller products line:

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“We were interested by the pressure range offered combined with the flow stability and low response time.”

For what purpose did you use the instrument? / For which applications?

“We are using the OB1 flow controller for particle sorting applications combining the use of microfluidics and non-inertial force fields (dielectrophoretic, magnetic or acoustic force, optical gradient force).”

What kind of experiments have you conducted using our machine?

We currently perform particle sorting under continuous flow using SAW devices. We have also performed immunomagnetic cell separation using a combination of microfluidics and magnetism.

In your opinion, what are the Elveflow instrument’s advantages?

“We really appreciate the stability and low response time of the flow controller, which is important when various flow conditions must be applied successively. The flow can be precisely and easily controlled thanks to a user-friendly interface. Fluid switching is also greatly simplified using the flow multiplexer.”

Overall, how satisfied are you with our equipment?

“We are very satisfied.”

Interview from 14 Oct 2013 about OB1 and MUX used since Apr 2013.

Wiebke DrenckhanInterview of Dr. Wiebke Drenckhan (personal web page) about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“We are using ELVEFLOW pressure control to generate equal volume bubbles using micro- and millfluidic devices. We tend to spend a lot of time moving around heavy bottles of compressed gasses for this purpose. We were looking for small, portable devices with a precise and reproducible control over a wide pressure range. Moreover, we wanted to work with air, instead of pure gasses.

What do you think about the performances of this instrument?

“We are very satisfied of the ELVEFLOW pressure pumps! The ELVEFLOW pressure pumps enable us to perform portable experiments with accurate pressure control.

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“The advantages are its portability, its accurate pressure control and the possibility to work with air.”

Dr. Drenckhan is a senior research fellow at the French national center for scientific research (CNRS). Dr. Drenckhan manages the Liquids Interfaces Group of the Physic of Solids Lab – CNRS UMR 8502 at Orsay University.

Dr. Drenckhan is specialized on liquids interfaces physic. Her group is interested in organisation and dynamics of monolayers of interfacially active agents (surfactants, proteins, polymers, nano-particles, and their mixtures) at interfaces. They also work on the structure and dynamics of thin liquid films stabilised by interfacially active agents, on the structure and dynamics of confined systems and on the structure, stability and mechanical/rheological properties of dispersed systems (solid and liquid foams, emulsions, foamed emulsions).

Interview from 28 Sept 2012 about AF1 used since Feb 2012.

blank man pictureInterview of Caglar Elbuken(personal web page) about the ELVEFLOW pressure controller products line:

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“The flexibility in adjusting the flow rate with high precision got our attention. The dynamic and responsive engineering team was an additional benefit.”

For what purpose did you use the instrument? / For which applications?

“We use it for nearly all of our projects replacing the syringe pumps in our lab. We especially appreciate the Elveflow system when it comes to droplet based systems which requires the control of multiple flows simultaneously.”

What are its advantages?

“Rapid setup time and the fact that we can very precisely adjust the flow rates through the user-friendly interface. In addition, the product portfolio is continuously expanding since we met with Elveflow. The new modules that are coming out are all very handy add-ons to the fundamental pressure unit we use. Thanks to Elveflow products, we can focus on our results rather than the tedious instrumentation.”

Overall, how satisfied are you with our equipment?

“Overall, I am very satisfied. I am also pleased to see that several accessories are coming out of the product pipeline.”

Interview from 10 Apr 2014 .

blank man pictureInterview of Samuel Kilchenmann (personal web page) about the ELVEFLOW pressure controller products line:

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“For our application we need a system that allows both fast sample handling and precise positioning of cells inside a microfluidic channel. For this reason we were looking for a system that is able to inject and manipulate liquids and features the possibility to stop the flow immediately without residual flow. For this reason we chose to get a pressure controller in combination with a flow multiplexer.”

For what purpose did you use the instrument? / For which applications?

“The instruments are part of an electrorotation setup, that is needed to study the kinetic response of single cells to AC electric fields.”

In your opinion, what are the Elveflow instrument’s advantages?

“For us the biggest advantage is the outstanding control on the flow with fast response times. It allows us to control the position of the cells and particles we want to study accurately in between the electrodes that we need to apply the electrical signal.

Overall, how satisfied are you with our equipment?

“The instruments that we got made our experiments much easier and reliable and we are highly satisfied with them. The control of the instruments is handled through a LabView interface and the available libraries are great and easy to integrate into your own VIs, so that tailored interfaces can be created efficiently.”

Interview from 12 Dec 2013 about OB1 and MUX used since June 2013.

 Weiqiang Chen

Interview of Dr. Weiqiang Chen (personal web page) about the ELVEFLOW pressure generator:

logo IBBL Biomechanics Laboratory

What got you interested in the instrument you bought? / Which characteristics convinced you to choose the Elveflow machine?

“The Elveflow system is one of the best available instruments in the marketthat integrates pressure generator and regulator into a single device, and is able to produce constant, stable and accurate pressure in a relatively large pressure range.”

For what purpose did you use the instrument? / For which applications?

“We are generally using this instrument to drive the flow in our microfluidic devices. It has been used for many different microfluidic applications such as microfluidic chip for isolation circulating tumor cells and integrated microfluidic system for immunology study.”

What kind of experiments have you conducted using our machine?

“We have used it for many experiments. One example is to deform cells and study their mechanical properties in microfluidic channels.”

In your opinion, what are the Elveflow instrument’s advantages?

“Accurate tuning of the pressure; easy operation; the ability to use computer to control the device; real-time pressure value readout; a very nice and use-friendly GUI.”

Overall, how satisfied are you with our equipment?

“Overall we are satisfied with the equipment and highly recommend it to anyone who is working in the microfluidics field.”

Interview from 12 Sept 2013 about AF1 used since Jan 2013.

blank man pictureInterview of Alessandro Gadaleta

What got you interested in the instrument you bought? / Whichcharacteristics convinced you to choose the Elveflow machine?

Simplicity (no need of external pressure source) and price

For what purpose did you use the instrument? / For which applications?

To apply a pressure gradient in nanofluidics experiments

What kind of experiments have you conducted using our machine?

Measurement of streaming current in solid-state nanopores, and to test the resistive pulse sensing of the pressure-induced transit of colloids in a nanopore

In your opinion, does the Elveflow instrument has some inconvenience?

Acoustic noise (but I guess it’s unavoidable) , some small bugs in the PC interface, and a bit of output noise in the applied pressure which masks the declared resolution

What are its advantages?

Mainly the small size and the included pressure source

Overall, how satisfied are you with our equipment?

Quite well!

Interview from 19 Sept 2013

blank man pictureInterview of Dr. Olivier Sandre (personal web page) about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“We use the ELVEFLOW pressure generator AF1 1600 to inject droplets of a magnetic fluid into a viscoelastic medium (Bingham gel). By moving the capillary in three dimensions with a robot, hundreds of perfectly identical droplets are deposited all over the gel.”

What do you think about the performances of this instrument?

“The ELVEFLOW instrument is precise (in term of repetability) and robust: it can run continuously for many hours, e.g. when we use it to coat the inside wall of capillaries by a silane monolayer.”

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“The main advantage of pressure control is the ability to drive flow in tiny capillaries, which can be really a pain when you try to do it with syringe pumps. We take also a great benefit from its portability, as we need to move our experiment from one lab to another.”

Dr. Sandre is a tenured researcher at the French national center for scientific research (CNRS). Dr. Sandre works in the team “Polymer Self-Assembly and Life Sciences” at the Laboratoire de Chimie des Polymères Organiques (LCPO) – UMR 5629 CNRS / University of Bordeaux.

Dr. O. Sandre works on the assembly of inorganic nanoparticles, especially ferrofluids, with organic structures such as polymer vesicles (from nano to giant ones), micelles or gel networks. He uses microfluidics among other tools to obtain well-controlled objects and materials. Since has joined LCPO in 2010, his work focuses on the biotechnological applications of magnetic polymer vesicles for the diagnosis and therapy of cancer.

Interview from 1 Feb 2013 about AF1 used since Sept 2012.

Rémy FulcrandInterview of Dr. Rémy Fulcrand about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“The ELVEFLOW pressure generators enable us to work on academic applications of micro and nano-fluidic. We use them to fill in micro and nano-channels and mainly to precisely control the flow of fluids trough our micro and nano-fluidic devices.”

What do you think about the performances of this instrument?

We are very satisfied with the ELVEFLOW instruments, the pressure ranges are very useful for our applications.”

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“We like very much the fact that the instruments are plug-and-play. It enables to easily set up an experiment with. We also like the portability of the ELVEFLOW pressure pumps, as we need to move our experiment.”

Dr. Fulcrand is a research engineer at the French national center for scientific research (CNRS). Dr. Fulcrand works in the Liquid at Interfaces’ Group of PMCN Laboratory – CNRS UMR5586 at Claude Bernard Lyon 1 University.

Interview from 10 Dec 2012 about AF1 used since Sept 2012.

Blank woman pictureInterview of Pr. Annie Viallat (personal web page) about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“The ELVEFLOW pressure generator enables us to generate an air flow that drives a liquid in a micropipette. This liquid is then injected into the oil to do a micro-emulsion (digital microfluidic).”

What do you think about the performances of this instrument?

“We are satisfied with the ELVEFLOW instrument, the regulation accuracy is well fitted with our applications”

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“The advantage of this instrument is the capability it offers to easily move the experiments anywhere you want. This feature is very convenient, especially when we encapsulate cells into droplets in cell culture platforms.”

Pr. Viallat is a senior staff scientist and research director at the French national center for scientific research (CNRS). Pr. Viallat works in the Adhesion & Inflammation Lab – CNRS UMR 6212 – INSERM UMR 600 at Aix-Marseille University. Pr. Viallat is also director of the CNRS French research consortium: physics from cell to tissue.

Pr. Viallat is specialized on soft-matter and physics at the cellular scale. Her laboratory is interested in the adhesion and dynamics in microflows of lipid vesicles and blood cells. Their recent work focuses on the properties of viscous and gelly lipid vesicles (responsiveness, adhesion, sedimentation). They also work on the coupling between rheological properties of microparticles and cells and their dynamics in various flows (shear flow, flows in biomimicking capillary networks).

Interview from 30 Jan 2012 about AF1 used since Aug 2011.

 

Pascal PanizzaInterview of Dr. Pascal Panizza about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“The ELVEFLOW pressure generator enables to generate droplets in microfluidic chips. It enables us also to produce foams.”

What do you think about the performances of this instrument?

We are satisfied with the ELVEFLOW instrument, the pressure accuracy is very good for our applications.”

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“The advantages of this instrument are its ease of use and the accuracy of the regulated pressure. This feature is very convenient, especially when we perform foams and microfluidic.”

Dr. Panizza is a senior staff scientist and research director at the French national center for scientific research (CNRS). Dr. Panizza works in the Soft Matter Department of IPR – CNRS UR1 UMR6251 at Rennes University.

Dr. Panizza is specialized on soft-matter and digital microfluidic. He studies the influence of boundary conditions such as surface topography, or confinement. The axis develops a recognized research in this area, especially in digital microfluidics: the traffic of dispersed objects (bubbles, droplets) in microchannel networks is studied and modeled, and micro/millifluidic tools are designed for high-throughput analyses. The other activity is the dynamics of fluid interfaces on patterned surfaces, for drop impact, bubble bursting, and the dynamics of liquid menisci associated to complex fluid drying.

Interview from 18 Sept 2012 about AF1 used since Jan 2012.

Blank man pictureInterview of Dr. Arnaud Saint-Jalmes (personal web page) about the ELVEFLOW pressure generator:

What is your application of the ELVEFLOW pressure generator?

“We use the ELVEFLOW pressure generator for studies of liquid foams. In particular, in experiments of foam controlled production. We use it also in experiments to determine the foaming ability of a liquid solution.”

What do you think about the performances of this instrument?

“We are well satisfied of the ELVEFLOW pressure pump. The ELVEFLOW is well accurate and easy to use, therefore, easily usable / transferable to different devices and tests.”

What is the main advantage of the ELVEFLOW pressure generator as regard to other flow control systems?

“The ELVEFLOW pressure generator has mainly enabled us to simplify several complex experimental setups by replacing them by the ELVEFLOW pressure pump while increasing the reproducibility of the experiments.”

Dr. Saint-Jalmes is a research director at the French national center for scientific research (CNRS). Dr. Saint-Jalmes leads the Soft Matter Group of IPR – UMR UR1-CNRS 6251 at Rennes University.

Dr. Saint-Jalmes is specialized on soft-matter and soft dispersed systems (in particular, on aqueous foams) and on gas/liquid interfaces. His laboratory is based on complementary experimental and theoretical multiscale studies, from molecular organisation to macroscopic behaviour. It relies on the development of physicochemical systems and novel experiments. The research activities are oriented towards “chemical engineering” and the conception and characterisation of highly structured, controlled and compartimented soft materials (for instance, like multiple emulsions, made from different complex fluids). Within such soft templates, the goal is to introduce stimuli-responsive molecules; they are creating new responsive and multi-functional materials.

Interview from 1 Oct 2012 about AF1 used since Apr 2012.

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