(IMAGE) Karlsruher Institut für Technologie (KIT) Caption The sensor consists of four areas with different metal oxides. They change their temperature-dependent electric resistance when coming into contact with gases. Credit Photo: KIT/HsKA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.