Which safety feature alerts users to a low air supply in the SCBA?

The feature that alerts users to a low air supply in the SCBA is the low-air alarm and visual indicator. This system is designed to enhance safety by providing an audible alarm when the air supply falls below a certain threshold. The acoustic signal ensures that the wearer immediately recognizes the need to exit the hazardous environment or take other necessary actions to ensure their safety.

In addition to the audible alarm, the visual indicator serves as a crucial supplementary signal, which allows the wearer to see when the air supply is running low. This dual alert system enhances situational awareness, allowing users to effectively monitor their air supply in challenging conditions.

Having both auditory and visual alerts is vital, as it addresses the potential for high-stress situations where the wearer may not have the time or capacity to check gauges manually. This integrated alarm system is a key feature of modern SCBA equipment, providing an essential layer of protection for users engaged in potentially life-threatening environments.