Gas sensors


Detector for halogenated organic compounds (Rice detector)

Electrochemical CO2/O2 sensor

Limiting-current type oxygen sensor for industrial applications

Oxygen sensor for inert gas systems and gas mixtures with combustible components

TCD array for selective gas analysis

Thick film sensor for H2 detection in chlorine

Electrochemical CO2/O2 sensor

Topic gas sensors

© Fraunhofer IKTS
Electrochemical CO2/O2 sensor, multipanel.
© Fraunhofer IKTS
Sensor response.

Applications for CO2 detection are numerous: the control of growth processes in biotechnology, air quality and pollution monitoring and medical respiratory systems to name just a few. Compared to state-of-the-art infrared based optical CO2 sensors, solid electrolyte electrochemical sensors allow low cost manufacturing of large sensor quantities along with a compatibility with a wide range of operating environments.


Development results


The sensor developed at IKTS has been designed for respiratory analysis applications and is based on a sodium-ion conducting solid electrolyte. A patented auxiliary electrode is implemented to compensate for possible O2 cross sensitivity and to detect sudden changes in O2 concentration. The sensor is manufactured in ceramic thick film technology with a size of 3.5 x 4.0 x 0.5 mm³. Sensor response in the range of 0.04-10 vol% CO2 in air shows Nernstian behaviour.


Services offered


  • Application-specific customization of sensor geometry, measuring range and operating parameters
  • Sensor packaging and integration via ceramic joining technology
  • Supply of sensor prototypes for evaluation purposes
  • Development and transfer of technologies for industrialization of sensor manufacturing


S. Dietrich, M. Kusnezoff, S. Mosch, N. Trofimenko, Impedimetrische Untersuchungen an Elektroden elektrochemischer CO2-Sensoren, Dresdner Sensor-Symposium, Conference Proceedings, 99-104, 2017, DOI: 10.5162/13dss2017/3.3

S. Dietrich, M. Kusnezoff, S. Mosch, C. Baumgärtner, Investigation of electrochemical processes in CO2 sensitive electrodes, EUROSENSORS 2018, Graz, Österreich, 9.–12. September 2018