Stroboscopes are versatile instruments for the visualisiation of very fast movements. They are important and necessary tools for the inspection and control of machines and manufacturing lines eg in printing or textile industries.
Stroboscopes could also be used for the non-contact measuring of rotational speed. If the stroboscope flash frequency matches the frequency of movement, the test object appears stationary. It can be observed and its frequency of movement recorded.
A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine.
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