Abstract: Welding gun with double conductor composed by a torch body (1) and electronic scales (2) to measure the intensity of the sensors (6) located in each conductor (3) and with mechanisms to trigger an alarm when there is an imbalance of the intensities circulating through both conductors. To this end, a microcontroller (5) connected to intensity (6) and temperature (8) sensors in the conductors is used, with indicators of failure or anomaly. The microcontroller (5) program calculates the difference between the magnitudes of both intensity signals and determines which of the two is higher, and, based on predefined parameters, triggers the corresponding alarm signal.