Vacuum gauge

A vacuum gauge is a device that measures the level of vacuum, or how much air or gas has been removed, inside a container or system. It helps determine the pressure below atmospheric pressure, indicating how "empty" a space is. This is important in applications like vacuum chambers, engines, or HVAC systems to ensure they operate correctly. The gauge provides a reading, often in units like inches of mercury (inHg) or millimeters of mercury (mmHg), so technicians can monitor, troubleshoot, and maintain optimal system performance.