E8.1 - Colorimetric gas sensors for RFID-Applications

Event
AMA Conferences 2015
2015-05-19 - 2015-05-21
Nürnberg, Germany
Band
Proceedings SENSOR 2015
Chapter
E8 - Gas Sensors IV
Author(s)
C. Pannek, K. Schmitt, I. Schumacher, S. Rademacher - Fraunhofer Institute for Physical Measurement Techniques, Freiburg (Germany), J. Wöllenstein - Albert Ludwigs University Freiburg, IMTEK, Freiburg im Breisgau (Germany)
Pages
718 - 722
DOI
10.5162/sensor2015/E8.1
ISBN
978-3-9813484-8-4
Price
free

Abstract

RFID offers the possibility, next to the identification, to monitor and/or control logistic processes e.g. for Food Chain Management. Here we present our investigations on the development and integration of colorimetric gas sensors on a RFID-platform. The reaction of a colorimetric sensor to its target gas leads to changes of its color, which is related to the target gas concentration. We developed different color dyes for CO, NO2 and NH3 and utilize them as a sensitive layer in optical sensors. Absorption changes are detected by attenuation of the guided light. An optical waveguide is mounted on top of the RFID tag, together with a LED as a light source and a photo detector. The complete sensor system has a very low power consumption of 100 mW maximum.

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