Flow under the magnifying glass (performance video)

A pressure controller was used to push water through a microfluidic circuit composed of 3 flow sensors in series – a Galileo flow sensor, a second sensor based on Coriolis force and a third sensor based on Thermal flow measurement. The pressure controller was set to impose 3 different sinusoidal flow rates in the working range of the 3 flow sensors, varying between :

• 3.5 µL/min and 6 µL/min (2.5 µL/min variation)

• 5.75 µL/min and 6 µL/min (250 nL/min variation)

• 5.975 µL/min and 6 µL/min (25 nL/min variation)

The video shows the live display of the flow rates measured by each of the 3 sensors.
The first two sinusoidal flows are correctly captured by the 3 flow sensors. But when it comes to the smallest variation of sinusoidal flow, only the Galileo flow sensor was precise enough to display the variations of 25 nL/min.

What parameters are you looking for from a liquid flow rate sensor? Let us know: innovation@microfluidic.fr