E8.1 - Colorimetric gas sensors for RFID-Applications
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- E8 - Gas Sensors IV
- 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)
- 718 - 722
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.