In a standard portable oxygen bottle, what color represents low outlet?

A standard portable oxygen bottle uses color coding to indicate various status levels. The yellow color specifically represents a low outlet pressure, alerting flight attendants and crew that the oxygen supply may be insufficient for intended use. This visual cue is essential for ensuring safety and preparedness in the event of an emergency.

Other colors are associated with different meanings: blue might represent full pressure, green is often used for normal operational status, and red could indicate an empty or critically low state. Understanding these color codes is vital for flight attendants to respond effectively to safety needs during a flight.