Endomagnetics Ltd is a medical device company arising from the London Centre for Nanotechnology at UCL and the University of Houston. The company’s first product (SentimagTM) offers a highly sensitive hand-held magnetic sensing device which can accurately detect low concentrations of clinically introduced nanoparticles. The initial application for the device will be as an intra-operative medical device for sentinel node detection in breast cancer. Other potential applications are in cardiovascular disease, melanoma detection and in the non-destructive testing of materials.