What safety enhancement does a digital monitoring system provide?

A digital monitoring system significantly enhances safety by providing real-time alerts to users regarding potential leaks in the heating oil tank. This capability is particularly crucial since leaks can lead to serious environmental hazards, safety risks, and costly damage. By monitoring factors such as tank levels, pressure, and other relevant metrics, these systems can detect irregularities that may indicate a leak or a failure. Prompt notification allows for immediate action to be taken, reducing the risk of spills and ensuring compliance with safety regulations.

In contrast, the other options do not directly or effectively relate to enhancing safety in the same way. For instance, while tank cleaning is important for maintenance, reducing the frequency of cleaning does not inherently improve safety. Manual overrides can be useful for operational control but do not specifically address safety concerns like leak detection. Finally, increasing heating oil usage detection does not contribute directly to safety, as it pertains more to resource management rather than preventing hazards. Therefore, the focus on alerting users to potential leaks represents the primary safety enhancement provided by a digital monitoring system.