What is the role of the End of Service Time Indicators (EOSTIs) in SCBA?

The role of the End of Service Time Indicators (EOSTIs) in Self-Contained Breathing Apparatus (SCBA) is primarily to indicate the remaining air time available for the user. EOSTIs serve as a vital safety feature that helps firefighters monitor their air supply, ensuring that they can exit hazardous environments before running out of breathable air. This indicator typically activates when the air supply reaches a predetermined limit, providing a clear warning to the firefighter.

Having an accurate understanding of air availability is crucial in emergency situations, as it allows the firefighter to make informed decisions about their remaining time in a potentially perilous environment. By facilitating awareness of remaining air, EOSTIs directly contribute to the safety and effectiveness of firefighting operations.