SQUIDs – ultimate magnetic sensors



SQUIDs (Superconducting Quantum Interference Devices) have extreme electromagnetic energy sensitivity, which can be applied in a wide variety of ways. Some of these are covered in the papers representing the rest of this symposium: in this brief introductory paper we indicate the wide extent of the full range of applications to which they have been put, from bioscience to tests of General Relativity. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)