What do pressure gauges measure in relation to tanks?

Pressure gauges are specifically designed to measure the internal pressure of tanks. This measurement is crucial in various applications, including industrial, chemical, and fire safety contexts, because the pressure level can indicate potential hazards, such as the risk of an explosion or the leak of volatile substances. Monitoring the internal pressure helps ensure the safe operation of the tank under varying conditions and contributes to maintaining proper functioning and safety protocols.

In contrast, measuring the temperature of the tank relates to thermal conditions rather than pressure. The weight of the tank does not directly reflect anything regarding the pressure contained within it. Additionally, the volume of liquid in the tank requires a different measurement device, such as a flow meter or level gauge, rather than a pressure gauge. Therefore, the focus of pressure gauges is specifically on the internal pressure readings.