How long is Segment 3 displayed when the pressure reaches its range?

Segment 3 is an important indicator of the air supply status on the MSA G1 Self-Contained Breathing Apparatus. When the pressure within the SCBA cylinder reaches the range of 33% or below, Segment 3 is displayed to inform the user of the critical air level. It is designed to remain visible for 30 seconds, providing adequate time for the user to assess their situation and make necessary decisions regarding their safety and exit strategy from hazardous environments. This design ensures that firefighters have a clear indication of their remaining air supply and encourages timely action to ensure their safety.

In contrast, other time durations like 10, 20, or 40 seconds do not reflect the operational protocols established for Segment 3, which is specifically calibrated for a 30-second display period for optimal safety monitoring.