What does a green line flow indicator signify?

• A. Oxygen is depleted
• B. Battery status
• C. Oxygen is working
• D. System fault

Answer: (C)

Color-coded indicators tell you the status of the gas delivery, and a green line flow indicator signals normal operation of the oxygen supply. Seeing green means oxygen is actively flowing through the line and the system is delivering as intended. It’s a quick way to confirm the device is functioning, rather than indicating a battery issue or a fault—those would typically show up with different colors or alarms. If the line stopped flowing or the system detected a problem, you’d expect the indicator to change color or trigger an alert. If in doubt, always check the device’s manual for its specific color codes, but green generally = normal oxygen flow.