TCD array for selective gas analysis
Topic gas sensors
Quantitative analysis of multi-component gas mixtures usually requires expensive analyzers based on mass spectrometry or gas chromatography or extensive implementation of complementary gas sensors. A different approach is based on the measurement of a gas mixture’s thermal conductivity at different temperatures, which allows to determine the gas composition quantitatively if the type of components is known. At Fraunhofer IKTS, a thermal conductivity detector (TCD) array for selective biogas analysis has been developed in cooperation with Henze-Hauck Prozessmesstechnik/Analytik GmbH.
The sensor array is suitable for quantitative analysis of a three components gas mixture consisting of CH4, CO2 und N2. Depending on the type of components, even four components can be identified quantitatively, e.g. CH4, CO2, N2 und H2. At the same time, the sensor array’s compact and modular design allows a cost-efficient and space-saving integration into existing process chains.
- Implementation of TCDs in thick film technology on ultrathin ceramic substrates (t≤60 µm)
- Adaption to further target gases depending on physical gas properties
- Integration of catalytically active layers for the detection of specific gas components
- TCD calibration and long term testing
- Supply of sensor prototypes for evaluation purposes