Arrangement and method for protective-gas measurement

The invention relates to an arrangement and a method for measuring a protective gas used in an arc-welding process by analyzing the protective gas escaping from a gas nozzle of a torch, wherein at least one sensor is arranged in an external measuring device for protective-gas analysis. For rapid, exact and practical determination and correspondingly effective evaluation of the protective effect of the protective gas, at least one sensor is arranged in an external measuring device for protective-gas analysis, which sensor is positioned at a distance from the torch which substantially equals the distance between the torch and a workpiece in a welding process so that the escape and effect of the protective gas of an actual welding process can be simulated, and that at least one sensor is connected to an evaluation unit and via the latter to a welding device.