Articles | Volume 8, issue 1
Regular research article
16 Jan 2019
Regular research article |  | 16 Jan 2019

Novel radio-frequency-based gas sensor with integrated heater

Stefanie Walter, Andreas Bogner, Gunter Hagen, and Ralf Moos

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Cited articles

Bailly, G., Harrabi, A., Rossignol, J., Stuerga, D., and Pribetich, P.: Microwave gas sensing with a microstrip interDigital capacitor: Detection of NH3 with TiO2 nanoparticles, Sens. Actuat. B, 236, 554–564,, 2016a. 
Bailly, G., Rossignol, J., de Fonseca, B., Pribetich, P., and Stuerga, D.: Microwave Gas Sensing with Hematite: Shape Effect on Ammonia Detection Using Pseudocubic, Rhombohedral, and Spindlelike Particles, ACS Sens., 1, 656–662,, 2016b. 
Barsan, N., Koziej, D., and Weimar, U.: Metal oxide-based gas sensor research: How to?, Sens. Actuat. B, 121, 18–35,, 2007. 
Beulertz, G., Votsmeier, M., and Moos, R.: Effect of propene, propane, and methane on conversion and oxidation state of three-way catalysts: a microwave cavity perturbation study, Appl. Catal. B, 165, 369–377,, 2015. 
Bogner, A., Steiner, C., Walter, S., Kita, J., Hagen, G., and Moos, R.: Planar Microstrip Ring Resonators for Microwave-Based Gas Sensing: Design Aspects and Initial Transducers for Humidity and Ammonia Sensing, Sensors, 17, 2422,, 2017. 
Short summary
A planar resonant radio-frequency gas sensor was equipped with an integrated heater. By simulative geometry optimization it now can be operated up to 700 °C. Sensitive materials with gas-dependent dielectric properties at higher temperatures can now be used. By coating the sensor with zeolite, ammonia could be detected. Depending on the working temperature, the sensor returns either a dosimeter signal (low temperatures) or a gas-concentration-dependent radio-frequency signal (high temperatures).