Method and apparatus for measuring characteristics of workpieces

The invention relates to a method and apparatus for determining geometrical features on a workpiece by determination of measurement points at different portions of the workpiece by means of at least a first sensor, wherein the first sensor comprises at least one probe extension with probe shaft. Here, a mechanical alignment between the first sensor and the workpiece is carried out is carried out to an extent that contact of the push button stem is omitted with the workpiece during the determination of geometric features before the measurement.