The Multimetrix RPM 82 is a very easy to use digital tachometer. It is used to measure rotation speeds with or without contact. The contact-free measurement of the speed is done via reflective adhesive tape, which is attached to the object to be measured. For the measurement of the speed with contact, the user can choose to measure the revolutions per minute or the surface speed. The measured values can be saved. By pressing and holding the memory button during the measurement, the device saves the last, maximum and minimum value of the time period when released. These can then be called up immediately after the measurement.