Sensor for monitoring concentration of gaseous substances
AssigneeFraunhofer Gesellschaft zur Foedering der Angewandten Forschung e.V.
InventorsWenmin Qu, Jorg-Uwe Meyer
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Abstract
The invention provides a sensor arrangement for monitoring the concentrat of moisture and gaseous substances in ambient air. A gas sensitive intermediate layer is sandwiched between top and bottom electrodes, each of which comprises first and second interdigitated conductive elements, which are coupled to an opposite polarity voltage. The top and bottom electrodes are super-imposed on opposite sides of the gas-sensitive intermediate layer, with fingers of the top electrode having a voltage polarity which is opposite that of adjacent super-imposed fingers of the bottom electrode.
Claims4
A sensor for determining concentration of gaseous substances, comprising:
- a gas sensitive intermediate layer sandwiched between top and bottom electrodes;
- wherein
- each of said top and bottom electrodes comprises first and second interdigitated conductive fingers having respective first and second contacts which are connected to opposite polarity voltages;
- said top and bottom electrodes are superimposed on opposite sides of said intermediate layer;
- fingers of said top electrode are aligned in registration with fingers of said bottom electrode, forming registered pairs of oppositely disposed fingers;
- and
- in each registered pair of fingers, a finger of said top electrode has a voltage polarity which is opposite that of an oppositely disposed finger of said bottom electrode.
Dependencies are inferred from the claim text.