device with a in a pipe bewegbaren newt, and a positionsdetektor for newt

摘要

Position detector for detecting the position of a moving part (12) within a pipe (10). The part has an attached permanent magnet (22), which is detected by a magnetic field sensor (24) attached to the pipe wall. The permanent magnet is magnetized in a direction such that there is a component along a radius relative to the pipe axis.