invention the probe can of course be operating with two or more antennas whereby the amount of time spent on inspecting the soil around the pipe can be reduced in a ratio almost inversely proportional to the number of antennas used among other things the number of antennas used will depend on the dimensions of the pipe however the design and mode of operation of the probe do not require it to be provided with a large number of closely set antennas according to the invention the antennas on the probe can be placed so that they have such a mutual spacing and angle angling that they satisfy the demands of a given inspection in the best possible way depending on the distance of the antennas to the inside face of the pipe and the area soil volume which is desired covered by the individual antenna in a given arrangement the cushion used on this antenna can be made larger or smaller in practice it has turned out that the leaks often are found at the joint between two pipe sections the probe according to the invention has the advantage in that it in such places can turn the antenna slowly.