Preparation for Hannover Messe (IMAGE) Saarland University Caption Melvin Chelli and Fabian Laurent, student research assistants in Uwe Hartmann's group, prepare the magnetic field sensor for presentation at the international industrial trade show Hannover Messe. Credit Oliver Dietze 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.