Abstract: A modular carriage for recording magnetic terrain data, notably for the non-invasive inspection of pipelines, electric cables or the like. The carriage includes an articulated chassis mounted on wheels including means for accommodating a device for recording the magnetic field coupled to sensors, a rear frame allowing the carriage to be handled by an operator, at least two positioning bars equipped with housings for securing the sensors along a first and a second axis respectively, the positioning bars forming a detection plane P substantially perpendicular to the direction of travel of the carriage.