The Fluxgate Magnetometer (FGM) consists of two kinds of magnetometers, an Analog Fluxgate (AFG) and a Digital Fluxgate (DFG). These will provide redundant measurements of the magnetic field and current structure in the diffusion region. The Analog Fluxgate magnetometer sensors are provided by the University of California, Los Angeles (UCLA). Digital Fluxgate magnetometer sensors are provided by the Institut fuer Weltraumforschung of the Austrian Academy of Sciences. C. T. Russell (UCLA) has overall responsibility for fluxgate development. The FGM is part of the FIELDS suite, which is led by Co-I R. B. Torbert (University of New Hampshire).