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Abstract.Recently, the combination of passive RFID tags with sensors has been absolutely required in various fields as well as distribution. In this study, we develop a novel sensor-type oxygen indicator based on a battery, which changes both color and electric signals depending on oxygen concentration, and propose the combined system of the self-powered oxygen sensor indicator with a passive UHF band RFID tag. Using this system, we monitored the oxygen concentration in a plastic package with oxygen absorber. The experimental results show that this novel system functions well.

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