Printable Sensors (image) Fraunhofer-Gesellschaft Caption The sensor recognizes the finger's heat signal without being touched. Credit Joanneum Research Forschungsgesellschaft mbH Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.