What component is essential in a tachometer system for providing electrical signals?

A tachometer is a critical component in a tachometer system, as its primary function is to measure and display the rotational speed of a shaft or rotor. For the tachometer to fulfill this role effectively, it must convert mechanical rotation into electrical signals, which are then processed to provide a readable output. This electrical signal typically corresponds to the speed of the rotating component, making it essential for monitoring performance in various applications like engines or industrial machinery.

In addition, while other components such as signal amplifiers, gearboxes, and fluid sensors may play supportive roles in specific systems, they do not serve the fundamental purpose of measuring rotational speed and generating electrical signals like the tachometer does. Understanding this primary function helps highlight the tachometer's integral role in any system that requires speed measurement.