Which segment corresponds to the green LED indicator for 50 to 74%?

The green LED indicator on the MSA G1 Self-Contained Breathing Apparatus (SCBA) provides a visual cue regarding the status of the air supply within the cylinder. The color green generally indicates that the air supply is at a sufficient level for safe operation. In the case of the indicator segment that corresponds to 50 to 74% of air supply, the correct segment is identified as Segment 2.

This is crucial for users to quickly assess their remaining air supply without having to check the gauge manually. Understanding the function of each segment helps ensure that firefighter personnel can maintain awareness of their air status during operations, which is vital for ensuring safety and effectiveness in hazardous environments.

For other segments that represent different levels of air supply, segment 1 typically indicates levels above 75%, while subsequent segments indicate lower levels, which without a doubt can result in increased concern and the need for prompt action to exit or replenish the air supply.