What does the pressure gauge on a dental unit measure?

The pressure gauge on a dental unit primarily measures the air pressure supplied for the operation of dental handpieces, delivery systems, and suction devices. This is important for ensuring that the dental equipment functions at optimal performance levels. By measuring the pounds per square inch (PSI) of air flow, the gauge helps dental professionals monitor the efficiency and effectiveness of the air pressure, which is critical for procedures requiring high-speed handpieces and other pneumatic tools.

In contrast, the other options do not accurately describe the function of a pressure gauge in a dental unit. The autoclave's temperature is typically monitored by a separate thermometer or gauge specifically designed for that purpose. The amount of dental suction is measured in a different way, often through a flow meter rather than a pressure gauge. The sterilization process is also monitored via specific parameters such as temperature and time, not directly by measuring air pressure. Thus, the pressure gauge's role is specific to air pressure regulation for dental equipment functionality.