%J Proceeding of International Conference On Research, Implementation And Education Of Mathematics And Sciences 2015 %L UNY21035 %T GIANT MAGNETORESISTANCE SENSOR FOR FERRIC CHLORIDE DETECTION USING MAGNETIC DISTURBANCE METHOD %A Ahmad Aminudin %A Mitra Djamal %A Suprijadi Suprijadi %A Daryono Hadi Tjahyono %I Faculty of Mathematics and Natural Sciences Yogyakarta State University