Tachometers, also known as speed counters, are devices that measure and display the speed of linear or rotational motion based on mechanical or electronic signals. Some models can also function as frequency meters. By providing precise measurements, they enable effective control and optimization of the performance of machines, vehicles, and automation systems.

Tachometers are widely used in the automotive industry, manufacturing, and mechanical engineering, offering accurate monitoring of equipment operating parameters.

The number of impulses in a time unit enables the measurement of rotational speed. The correct sensor, mounted on the shaft, enables its use as a speed indicator to adjust rotational speed or protect the device against underspeed or overspeed situations