A scanning system developed for planar magnetic surfaces composed of a moving line of
three magnetoresistive ultrasensitive transducers, complemented by a signal conditioning
circuit is presented. After the calibration of the sensors, it was used to determine magnetized
surface images with different shapes to evaluate the sensitivity of the device, and the images
are represented in gray levels on a scale from 0 to 255 intensities, to get a visual
representation of the magnetic field strength. The device is shown to be sensitive enough to …