Abstract
Detection of magnetic field is essential for many applications such as automobiles, military, robotics, medical devices, space equipment, geophysics, industrial measurements etc. So far, different types of magnetic sensors such as Hall sensors, semiconducting magnetoresistors, ferromagnetic magnetoresistors, fluxgate sensors, superconducting quantum interference device (SQUID), resonant sensors, induction magnetometer, linear variable differential transformer, inductosyn, synchros and resolvers, Eddy current sensors, variable reluctance sensors, magnetic encoders, permanent magnet linear contactless displacement sensors, magnetoresistive position sensors, reed contact, Wiegand wires, magnetic force and torque sensors, magnetic flowmeters and current sensors have been developed to meet the requirements of the above mentioned application. In this article, recent advances and developments in the field of magnetic sensors has been presented. The common magnetic sensors and their applications are briefly discussed.
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