Abstract: The magneto resistance position sensor is composed of AA002 series analog sensors and a little magnetic steel. Positions of either hanged body or water mark are measured. The Young modulus of steel and volume of steel ball are also measured. The experimental result indicates that the magneto resistance position sensor is actable, precision, simple and sensitivity. A series of physical experiments using the giant magneto resistance sensor are designed.

Key words: magneto resistance, giant magneto resistance effect, giant magneto resistance sensor, physical experiment