As wireless sensor networks (WSNs) begin finding more applications in industrial environments, one potential drawback is the need for a battery on each wireless node. This means that as the number of wireless devices grows, battery replacement could turn into a costly and time-consuming problem.  

That’s one reason that energy harvesting technology—which could potentially eliminate the need for batteries—was grabbing a good deal of attention at the recent Sensors Expo & Conference June 8-10 in Rosemont, Ill., near Chicago’s O’Hare International Airport. For the first time this year, the Sensors Expo included an Energy Harvesting Pavilion on the show floor, sponsored by a half dozen companies that are active in the field. An Application Showcase Theater at the show was dominated by presentations on energy harvesting and related battery and energy storage topics.

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