A portable magnetic field analyzer for sensing ion specific resonant magnetic fields. The analyzer has a magnetometer which measures the magnetic field produced by both ac and dc sources along an axis and determines the dc field plus the fundamental and various harmonic frequencies. A microcontroller...http://www.google.se/patents/US5316634?utm_source=gb-gplus-sharePatent US5316634 - Portable magnetic field analyzer for sensing ion specific resonant magnetic fields
