A magnetostrictive distances distance-based sensor to deliver a signal with a magnetic field sensitive sensor element, which is a signal generator, a signal processing unit and, if appropriate, a diagnostic output, which are accommodated in a housing, as well as with a displaceable magnet, which acts on the sensor element, characterized in that the stretching sensor can be placed in a programming mode, and in that the diagnostic output comprises at least one of the following detection elements:– Sensing element for the function of sensor element can be seen, a magnet;– Sensing element for the function of stretching sensor is located in the programming mode– Sensing element for the voltage monitoring device with at least two voltage values are not equal to zero.
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