Pressure-driven flow is a means of driving liquid flow by applying gas pressure (or vacuum) to a sealed reservoir. A pressure and/or flow sensor is used to close the control loop, enabling high-precision control of the liquid flow. This approach has a number of advantages over conventional microfluidic drive systems / pumps, including rapid response time, stable flow control and the ability to support a wide range of flow rates.
In addition, because the pump (or pressure source) does not contact the liquid directly, cross-contamination between liquids is avoided. This separation supports the reusable-consumable model widely adopted across diagnostics, with the pump located in a reusable part of the system (i.e. instrument) and the liquid path in a consumable (i.e. cartridge). With its pulsation-free output, high-precision control and compact form factor, Disc Pump is an ideal miniaturised pressure source for many microfluidic applications.
Download our Microfluidics application note pdf2.38 MB
Download our Point of Care case study pdf1.7 MB