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公开(公告)号：DE4030651A1
公开(公告)日：1992-04-09
申请号：DE4030651
申请日：1990-09-28
Applicant: BASF AG
Inventor： FUCHS HARALD DR , SCHREPP WOLFGANG DR , RAPP MICHAEL DR , HUNKLINGER SIEGFRIED PROF DR , SCHICKFUS MANFRED VON DR
Abstract: The invention relates to a highly sensitive surface-wave gas sensor in which the frequency of an oscillatory circuit containing a surface-wave delay line is altered as a function of the type of gas and gas concentration as a result of the interaction of a surface-wave field with a solid-state film suitable for adsorbing the gas to be determined. The delay line provided for the adsorption of the gas is completely coated with the solid-state film and the dimensioning of the delay lines is such that the length of the surface-wave transducer is greater than that of the delay line.
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