An alignable sensor, the connecting housing of which receives within a passage rotatably a stub of a prismatic intermediate piece, the intermediate piece comprising a holding plate aligned at an angle of 45.degree. to the axis of the connecting piece and to a side wall, for a sensor head, and the sensor...http://www.google.fr/patents/US4967481?utm_source=gb-gplus-shareBrevet US4967481 - Alignable sensor
