A modular microfluidic parallel dispensing system

We report a microfluidic building block (MFBB) for the controlled and automated dispensing of liquid. The device architecture is based on two arrays of parallel fluidic resistors, with each resistor having a pneumatically controlled valve for modulating flow. A range of hydraulic resistances are used within each array resulting in a wide range of possible flow rate combinations and therefore a high dynamic range for dispensing liquid. A dynamic range of up to 1:128 in only 30 seconds was demonstrated. The device was additionally tested in combination with another MFBB sharing one Fluidic Circuit Board (FCB) and control script.