Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Integrated pre-concentrator gas sensor system for improved trace gas sensing performance

: Leidinger, M.; Sauerwald, T.; Schütze, A.; Alepee, C.; Rieger, M.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE SENSORS 2016 : Orlando, Florida, USA, October 30-November 2, 2016; Proceedings papers
Piscataway, NJ: IEEE, 2016
ISBN: 978-1-4799-8287-5
ISBN: 1-4799-8288-1
ISBN: 978-1-4799-8288-2 (Print)
Sensors Conference <15, 2016, Orlano/Fla.>
European Commission EC
Nanotechnology based intelligent multi-SENsor System with selective pre-concentration for Indoor air quality control
Fraunhofer ICT ()

An integrated gas measurement system is presented which combines MEMS gas sensors with a micro gas pre-concentration device. Designed to increase gas sensor selectivity and sensitivity, the pre-concentrator samples gases and releases them by thermal desorption. Simulations show that the design works very well for volatile organic compounds in the ppb concentration range, which would be the target gases in indoor air quality monitoring. A gas concentration increase of a factor of 27 was achieved in the presented setup of the simulation. In test measurements with benzene, the successful operation of the integrated system is demonstrated for concentrations down to 10 ppb. The height of the sensor response was nearly doubled during pre-concentrator gas desorption.