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As a result of the integration of the magnetic field along a closed loop around the conductor the sensor correctly measures the current independent of the particular field distribution or currents in the Signal at constant current vs coil temperature. Normalized signal 1.002 constant current +/-0.1% 1.001 1.000 0.999 0.998 1 2 3 A fiber-optic current sensor for the measurement of dc currents up to 500 kA in the electro-chemical industry has been developed.
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