Title :
Detection of gases and vapours concentration from resonance curve of interdigital system
Author_Institution :
Dept. of Technol. & Meas., Univ. of West Bohemia in Pilsen, Pilsen, Czech Republic
Abstract :
Interdigital structure with thin film sensitive organic layer is the base of many sensors for gases and vapours detection. This structure with sensitive layer has capacitive character where the influence of gas and vapour causes the change of its capacitance and dissipation factor. Resonance circuit, created by interdigital structure and an inductor, is then suitable for gas and vapour concentration detection. This article describes methods of relative humidity detection from the resonance circuit curve and presents many experimental results as well.
Keywords :
chemical variables measurement; gas sensors; humidity measurement; humidity sensors; inductors; interdigital transducers; polymers; resonance; thin film sensors; capacitive characteristics; dissipation factor; gas detection; inductor; interdigital system; relative humidity detection; resonance circuit curve; thin film sensitive organic layer; vapour concentration detection; Capacitance; Equivalent circuits; Gas detectors; Gases; Inductance; Inductors; Q factor; RLC circuits; Resonance; Resonant frequency;
Conference_Titel :
Electronics Technology, 2009. ISSE 2009. 32nd International Spring Seminar on
Conference_Location :
Brno
Print_ISBN :
978-1-4244-4260-7
DOI :
10.1109/ISSE.2009.5207060
