Author_Institution :
Honeywell Inc., Minneapolis, MN, USA
Abstract :
Eleven of the most common technologies used for magnetic field sensing are described and compared. These are the search coil, flux-gate, optically pumped, nuclear precession, SQUID, Hall-effect, magnetoresistive, magnetodiode, magnetotransistor, fiber optic, and magnetooptic technologies. The use of these sensors in relation to working with or around the Earth´s magnetic field is addressed. Three classes of applications and a specific application from each are examined: low-sensitivity (noncontact switching), medium-sensitivity (magnetic anomaly detection and magnetic compassing), and high-sensitivity (brain-function mapping)
Keywords :
biological techniques and instruments; biomagnetism; electric sensing devices; magnetic field measurement; magnetometers; reviews; Earth´s magnetic field; Hall-effect; SQUID; brain-function mapping; fiber optic technology; flux-gate; high-sensitivity; low-sensitivity; magnetic anomaly detection; magnetic compassing; magnetic field sensing; magnetic sensors; magnetodiode technology; magnetooptic technologies; magnetoresistive technology; magnetotransistor; medium-sensitivity; noncontact switching; nuclear precession; optical pumping magnetometers; review; search coil; Coils; Earth; Magnetic fields; Magnetic sensors; Magnetic switching; Magnetoresistance; Optical fibers; Optical pumping; Optical sensors; SQUIDs;
