At what PSI does the vibe-alert on an SCBA start to vibrate?

The vibe-alert system on a Self-Contained Breathing Apparatus (SCBA) is designed to provide a tactile and noticeable warning to the user about the remaining air supply. The system typically activates when the pressure in the air cylinder drops to a more critical level, specifically at 1500 PSI. At this point, it serves as an important reminder for the user to be mindful of their remaining air and to exit the hazardous environment in a timely manner.

Understanding this mechanism is crucial for ensuring the safety and effectiveness of SCBA use in emergency situations. The activation of the vibe-alert at 1500 PSI aids in preventing situations where the user might become aware of low air levels too late, potentially compromising their safety. The choice of pressure for the alert is established through safety regulations and practical usage data gathered from firefighters and other first responders to ensure operational efficiency.