Contact tachometers
Tachometric measurements

Contact tachometers are equipped with a tip, generally conical, which is brought into direct contact with the center of the axis of the rotating system whose speed is to be measured.

Since all tachometers now use digital technology, the rotation of the tip is transformed in the tachometer into an electrical pulse, which is then counted in a similar way to photoreflective tachometers. As a result, contact tachometers have the same...