How does a pressure switch function in a pneumatic system?

In a pneumatic system, a pressure switch plays a crucial role in monitoring the pressure levels present within the system. Its primary function is to detect when the pressure reaches specific set thresholds. Once these pressure levels are detected, the pressure switch sends electrical signals, allowing it to activate or deactivate other components of the system, such as compressors or alarms.

This functionality is essential for ensuring the safe and efficient operation of pneumatic systems. By automatically maintaining pressure within desired limits, the pressure switch helps avoid conditions that could lead to system failure or inefficiencies. For instance, if the pressure drops below a certain level, the pressure switch can signal a compressor to turn on, restoring the proper pressure needed for optimal operation. Conversely, if pressure exceeds a safe threshold, it can trigger a shutdown or alarm to prevent damage.

Other options primarily refer to functions that are outside the operational scope of a pressure switch in pneumatic systems. The adjustment of air flow rate, regulation of temperature, and measurement of air volume are typically managed by different components and systems, such as flow control valves, thermostats, and flow meters respectively.