What does a limit switch do in a hydraulic system?

A limit switch in a hydraulic system is designed to provide control by signaling when an actuator, such as a cylinder or valve, reaches a predetermined position. This functionality is crucial for ensuring the system operates within its intended parameters. When the actuator reaches the specified position, the limit switch sends a signal which can then be utilized to stop the actuator, trigger another action in the system, or indicate a specific status.

This capability helps prevent potential issues such as overextension or not achieving the desired stroke length, thus contributing to the efficient and safe operation of hydraulic machinery. It also enhances automation, allowing for better control in processes that rely on precise movements or cycles.

The other options describe functions that are typically managed by different components within a hydraulic system. For example, controlling overpressure is typically the role of pressure relief valves, while fluid temperature regulation is managed by thermostats and cooling systems. Enhanced flow rates are usually achieved through the design of pumps and valves rather than through a limit switch.