Microfluidic devices, systems, and methods measure viscosity, flow times, and/or other flow characteristics within the channels, and the measured flow characteristics can be used to generate a desired flow. Multi-reservoir pressure modulator and pressure controller systems, electrokinetic systems and/or...http://www.google.fr/patents/US6681616?utm_source=gb-gplus-shareBrevet US6681616 - Microfluidic viscometer
