%0 Journal Article %T Detector prototipo basado en un campo el¨¦ctrico %A Correa %A Rodrigo %A Pe£¿a %A Juli¨¢n %A Reyes %A ¨®scar %J Revista Ingenier¨ªas Universidad de Medell¨ªn %D 2009 %I Universidad de Medell¨ªn %X this article describes the design and construction of a prototype system that senses objects perturbing a uniform electric field generated in a defined volume. to set up this system, an electric circuit capable of detecting any moving object even through a 0.15meter-thick brick wall was designed and built. although the excellent electrodes sensibility to any object's position change going into or out the field, it was found the need for a reference electrode. tests were carried out in order to check the system's movement sensibility. it was observed that the relative size and shape of the electrodes affects the detectora£¿£¿s sensitivity for getting slow movements. %K electric field %K electrodes %K instrumentation %K sensors. %U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S1692-33242009000200010&lng=en&nrm=iso&tlng=en