Integration of an oxygen indicator sensor with a passive UHF band RFID tag

For the creation of smart RFID tags, we have developed an oxygen indicator sensor based on a metal cell that both changes color and generates electrical signals depending on the oxygen concentration, and integrated the colorimetric oxygen sensor with a passive UHF band RFID tag. The resulting integrated system was used for the online monitoring of oxygen concentration in a plastic package containing oxygen scavengers, and it was found to function well as a smart RFID tag.

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