Electric current sensors a review

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The review makes a brief overview of traditional methods of measurement of electric current
and shows in more detail relatively new types of current sensors. These include Hall sensors
with field concentrators, AMR current sensors, magneto-optical and superconducting current
1 `( a! u& Q$ Esensors. The influence of the magnetic core properties on the error of the current transformer
8 J# S5 x$ c4 M+ Nshows why nanocrystalline materials are so advantageous for this application. Built-in CMOS
5 E- }, J) z( C% fcurrent sensors are important tools for monitoring the health of integrated circuits. Of special
industrial value are current clamps which can be installed without breaking the measured
/ p1 T* C  O) R( lconductor. Parameters of current sensors are also discussed, including geometrical selectivity.
9 Y3 w3 Z; Z+ p/ c  M' k, Y9 FThis parameter specific for current sensors means the ability to suppress the influence of
$ s8 I& B) l( ?2 T+ N, icurrents external to the sensor (including the position of the return conductor) and also
suppress the influence on the position of the measured conductor with respect to the current