What is a compound gauge used for?

A compound gauge is specifically designed to measure both pressure and vacuum within a system, making it versatile for various applications in commercial food equipment. This type of gauge has a dual scale, allowing it to display positive pressure readings as well as negative pressure (or vacuum) readings. This capability is critical in environments where both types of measurements are necessary for safe and effective equipment operation.

For instance, in steam systems, monitoring both pressure and vacuum is essential for ensuring that the equipment operates efficiently and safely. If only pressure were measured or vacuum alone, it would provide an incomplete picture of the system's performance, potentially leading to inefficiencies or operational issues.

Other choices focus on aspects that are not covered by a compound gauge. Temperature reading relates to thermometers, while steam flow measurement would typically require a flow meter. The reference to vacuum pressure alone does not encompass the full range of measurements a compound gauge can provide, which includes both pressure above atmospheric levels and vacuum below it.