What is the primary limitation of using a tachometer in a hydraulic system?

The primary limitation of using a tachometer in a hydraulic system is its inability to detect position. Tachometers are designed specifically to measure rotational speed or angular velocity of a shaft. They provide a continuous output that reflects how fast something is rotating, which is crucial in many hydraulic applications to ensure optimal performance. However, this capability does not extend to providing information about the exact position of the shaft or component at any given moment.

In hydraulic systems, knowing the position of components like valves or actuators is often essential for effective control and operation. Position feedback is typically provided by other sensors, such as linear position transducers or encoders, which are specifically designed for that purpose. Thus, while a tachometer can provide valuable data regarding speed, it cannot give the system operators the information needed for precise positioning, highlighting a significant limitation in its application within hydraulic systems.