What is a release detection method that utilizes sensors to monitor changes in pressure?

The chosen answer, which focuses on pressure monitoring systems, accurately identifies a release detection method that relies on sensors to track changes in pressure within the underground storage tank system. Pressure monitoring systems are specifically designed to detect any variations that may indicate a leak by assessing the pressure levels of the product in the tank or the interstitial space. When there is an unexpected drop in pressure, it typically suggests that there could be a breach in the system, allowing product to escape, which triggers alarm systems or prompts further investigation.

In contrast, leak detection systems may encompass various methods including pressure monitoring, but they are broader in scope and can also include techniques like vacuum monitoring or electronic sensor systems. Electromagnetic detection is a different technology that involves measuring electromagnetic fields to locate leaks, not specifically related to pressure changes. Visual inspections, while useful, rely on human observation and are not directly tied to sensor-based pressure detection. Thus, pressure monitoring systems are uniquely suited to the specific context of using sensors to monitor pressure changes for leak detection.