What does the pressure gauge indicate when it is unstable?

When the pressure gauge shows instability, it indicates a possible system malfunction. Pressure gauges are designed to provide consistent readings to reflect the operating conditions of the system they monitor. Unstable readings can suggest irregularities such as fluctuations in flow, pressure loss, or mechanical issues within the system. These irregularities may stem from factors like leaks, blockages, or failure of components that regulate pressure. Therefore, an unstable pressure gauge is a critical indicator that prompts further investigation into the system's health and operational status to ensure safety and functionality.