This paper presents the design process, construction and performance analysis of a prototype that uses magnetic field density measurements via a Hall-effect sensor to determine the position of an object that is exposed to a magnetic field source. We describe all the technical aspects that were considered in prototype design, namely the criteria for the selection of components, the characteristics of the field source, the choice of acquisition card, the data transmission protocol and the control software. Calculations are also presented together with the data transmission program content via USB protocol and the software package used for data acquisition and processing (LabVIEW®). Additionally, the behavior and the most important features of the prototype’s performance are graphically represented and accurately described, comparing the different results to quantify error measurements and to establish the aspects that most affect and drive the operation of the prototype.