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The study of electrical currents flowing through the airframe is very important from an EMC (Electromagnetic Compatibility) standpoint due to the potential to produce severe aircraft faults. As an example, direct lightning strikes are one of the main failure causes, effect on which we will orient our work. Furthermore, one of the key points where the study of currents is more complex are the discontinuities formed by the mechanical joints that attach fuselage plates, in addition to the difficulty of placing sensors to measure current flowing through these junctions. In this work, a fixture intended to emulate such discontinuities of mechanically attached panels will be developed and evaluated. Subsequently, a prototype of probes capable to measure current flow will be built and studied theoretically and experimentally. Having the prototypes validated, flat probes embedded in a PCB will be constructed to be able to be inserted into the mechanical junctions, such as screws or rivets. Finally, current probes will be verified by means of a surge generator, capable of producing a wave similar to the one originated by a direct lightning strike.