Platform Magnetometer

Platform Magnetometer: Hi-Rel Magnetometer FGM-A-75 from ZARM is an instrument for measuring three-dimensional magnetic fields. It is based on the fluxgate principle, using three independent ring-core sensor heads for each orthogonal axis. Mass total: <0.3 kg, size: 100 × 82 × 34 mm³.

Source: http://www.zarm-technik.de/products/magnetometer/