Rotational speed (tachometers)

Portable devices suitable to measure rotational speed of axis or lineal speed of conveyors. There are two main methodologies. Measurement by contact. The measurement is produced when an element rotates (a wheel or an axix element) and that by friction transmits the movement to the measured element. Optical measurement. The mobile element has two reflective labels. The device detects optically (by light refraction) the frequency of passage of reflective and thus we indicate the magnitude of the rotation speed. We have devices that incorporate both systems and one can use one or the other depending on the location where the [...]