Fluidigm of South San Francisco, Calif., has received US Patent No. 8,440,093, "Methods and devices for electronic and magnetic sensing of the contents of microfluidic flow channels." The patent describes a "microfabricated elastomeric structure" through which a change in the electrical or magnetic environment is sensed. More specifically, an electric field is applied to volume in the structure, and a change in impedance, current, or combined impedance and current is measured.

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