Abstract: A mobile irradiation platform, in particular for use in pipe lining processes for sewer or manhole rehabilitation, includes a chassis, one or more irradiation devices mounted in the chassis, and configured to emit radiation energy and having a radiation direction extending radially to a longitudinal extent of the irradiation platform, a plurality of stabilizing arms articulated to the chassis and designed to centrally support the chassis in the interior of a hollow body, and at least one dielectric sensor attached to a chassis-remote end of one of the plurality of stabilizing arms and designed to detect changes in dielectric properties in the environment of the stabilizing arm.