Abstract
Microfluidic systems with modular components are attractive alternatives to monolithically integrated microfluidic systems because of their flexibility. In this study, we apply the modular concept on a water-head-pressure-driven microfluidic oscillator and obtain a widely tunable flow rate and fluidic switching period. Modular fluidic resistors can be easily mounted onto and demounted from a main chip by means of plastic male connectors. The connectors enable a leak-free connection between the modular resistors and main chip (leakage pressure > 140kPa). With modular resistors, we show independent control of the flow rate and flow switching period of the oscillator system in a wide range (2.5s-6.4h and 2 μL/min-2mL/min). This modular approach can be used to enhance the flexibility of instruction-embedded microfluidic circuits in which their operational range is limited.
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