An advanced metal detector coil encompasses the diameter of the sensor head. Passing current through the MD coil creates an electromagnetic field that induces an electrical current in any metal ...

Opening the instruction leaflet it becomes clear that this is intended for use in monitoring electromagnetic fields for the purpose ... than the traditional metal-detector type of wire finder, ...

China's first helicopter-borne geophysical electromagnetic detection has successfully carried ... breakthroughs in high-sensitivity magnetic field sensors, large dynamic range signal reception ...