The electronics and the measuring section are placed inside an aluminum profile. This aluminum profile is a hermetically sealed housing with IP-rating IP67. The magnets of the position sensor affect the waveguide through the wall of the aluminum profile.
Position sensors are available in a guided or freely moving variant. Freely moving position sensors are directly fixed to the moving machine part which is to be measured and jointly move in a certain distance over and along the profile. The advantage of this method is low requirements toward guidance precision: the sensors tolerate lateral and vertical offset of up to a few millimeters. Where even these generous tolerances cannot be maintained guided position sensors provide a solution. Here, the profile housing of the distance sensor also acts as rail for the position sensors slide. In this case even strong counter-directed movements are compensated by ball joints on a rod.