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The design, fabrication and integration of capacitive void fraction sensors for microfluidic applications in silicon microchannels of 100 μm wide and 500 μm deep are described. Microfabrication steps such as electrode deposition, glass dicing and drilling and the anodic bonding process are elucidated. A read-out circuit was designed to convert capacitive input signals into a large-swing analog output signal. The signal processing algorithm is discussed. Measurements showing the variation of the output signal in function of the gas content in the air/water-mixture that was pumped through the microchannels are presented. ispartof: pages:643-646 ispartof: Procedia Engineering vol:47 pages:643-646 ispartof: Eurosensors location:Kraków, Poland date:9 Sep - 12 Sep 2012 status: published

With a body-size clinical setup in mind providing power to wireless and batteryless medical inspection capsules, a dedicated Class-E driver was designed, simulated and tested. With a supply of 50 V, a Vds of 500 V is generated driving a current through a 147 μH Helmholtz coil, thereby generating an alternating magnetic field at 1 MHz, sufficiently strong to drive a self propelled gastrointestinal inspection capsule. The volume in which capsule operation is guaranteed, is boosted (by a factor of 20 compared to previous work) to 0.18 m3, covering the complete upper body.