The invention relates to a wall thickness measuring device for pipes and the like, more particularly of extruded plastics, having a measuring head (15) connected to measuring and supply leads. The measuring head is mounted to be reversed around an opening of passage A for the pipe to be measured by means...http://www.google.de/patents/US4905516?utm_source=gb-gplus-sharePatent US4905516 - Wall thickness measuring device for pipes, cable casings and the like, more particularly of extruded plastics
