Shielded position sensor for translationally moving parts

摘要: A sensor is disclosed for monitoring a part which can move translationally relative to with reference its position on the axis of motion. This example piston in cylinder equipped sensor. The be actuated by means magnet oriented direction motion respect north and south pole located movable part. has three reed contacts are aligned parallel first second contact one plane next another their lengthwise axes, they almost at same time magnetic field third distance contact. two mounted facing actuating magnet. arrangement advantage that an external always as well, if it actuate contacts. Then indicates error report or unsafe position, but never safe