SET-UP TIME : 5-10 MIN / DIFFICULTY : *****
This application note describes how to use a flow controller as a syringe pump and to set and monitor a determined liquid flow rate and perform a flow control for your microfluidic experiments by using an Elveflow® pressure & flow control instrument and a flow sensor. The new version of the Elveflow® smart software allows to virtually turn your pressure controller into a syringe pump keeping the advantages of both methods (high performance, ease of use, intuitiveness, etc.)
The software version used for this application note is an old version of Elveflow® Smart Interface. (New version is now available)
This picture shows the microfluidic setup that will be used for this application note.
The Elveflow® pressure control instrument used in this note is the OB1 MkII pressure controller, but we could just as easily have used an AF1 Premium pressure generator for this task.
As often as possible avoid using soft tubing (like Tygon) which involves compliance and then increases the response time of the system. If you’re not familiar with microfluidic tubings, you can read our dedicated tutorials.
The following diagram illustrates the complete chain of elements involved in this application note. You will need to assemble all those parts to set up your experiment.
Using the Elveflow® smart interface to monitor a determined liquid mass flow rate. Be sure that all the cables and tubing are well connected to your Elveflow® instrument (USB cable, 24V DC, Flow sensor data cable, etc). Perform leakage tests and remove any air bubbles before starting your experiment to ensure a good flow rate regulation. Knowing what fitting is best suited for your needs is a first step towards success. If you’re not familiar with microfluidic fittings, you may read our specific tutorials. The flow sensor is very sensitive to vibrations and movement perturbations so it is recommended to fix it to a stable surface as often as possible.
In order to monitor a constant flow rate of e.g. 50µL/min on the Elveflow® smart interface for your microfluidic system, it is necessary to follow the next steps:
Congratulations! You’ve achieved the flow rate control using an Elveflow® Flow sensor and the Elveflow® pressure control instrument!
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Do you want tips on how to best set up your microfluidic experiment? Do you need inspiration or a different angle to take on your specific problem? Well, we probably have an application note just for you, feel free to check them out!
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