A combined exhaled air and environmental gas sensor apparatus for mobile respiratory equipment includes a housing, wherein the housing includes a port aperture, a connector configured to attach the port aperture to a respiratory exhaust port, and at least an ambient aperture connecting to an exterior environment, a sensor positioned within the housing, the sensor configured to detect a carbon dioxide level and generate sensor outputs indicating detected carbon dioxide level, a processor communicatively connected to the sensor, the processor including a memory, a breath analysis mode and an environmental analysis mode, wherein the processor is configured to receive a plurality of sensor outputs from the sensor, match the plurality of sensor outputs to mode parameter profile, and switch between the breath analysis mode and the environmental analysis mode as a function of the mode parameter profile.

A method of supplying oxygen to an oxygen mask for an aircraft includes detecting, with at least one sensor and during a first time period, a first blood-oxygen saturation level at a first altitude. The method may also include detecting, with the at least one sensor and during a second time period, a second blood-oxygen saturation level at a second altitude that is different from the first altitude. The method may include determining a minimum flow rate of a gas that includes oxygen for the second altitude such that the second blood-oxygen saturation level at least matches the first blood-oxygen saturation level at the same altitude.

A method of supplying oxygen to an oxygen mask for an aircraft includes detecting, with at least one sensor and during a first time period, a first blood-oxygen saturation level at a first altitude. The method may also include detecting, with the at least one sensor and during a second time period, a second blood-oxygen saturation level at a second altitude that is different from the first altitude. The method may include determining a minimum flow rate of a gas that includes oxygen for the second altitude such that the second blood-oxygen saturation level at least matches the first blood-oxygen saturation level at the same altitude.

An aircraft emergency oxygen supply system includes: at least one passenger oxygen mask; a compartment for housing the at least one passenger oxygen mask; and at least one oxygen hose. E each of the at least one passenger oxygen mask is coupled to a respective oxygen hose for supplying a gas comprising oxygen to the respective oxygen mask; at least one fixing clip. Each of the at least one fixing clip comprises a lanyard fixing portion and at least one C-shaped oxygen hose fixing portion for releasably holding one or more oxygen hoses. For each of the at least one fixing clip, the aircraft emergency oxygen supply system comprises a lanyard having a first end, which is fixed at the compartment, and an opposing second end, which is fixed to the lanyard fixing portion of the respective fixing clip.

An aircraft emergency oxygen supply system includes: at least one passenger oxygen mask; a compartment for housing the at least one passenger oxygen mask; and at least one oxygen hose. E each of the at least one passenger oxygen mask is coupled to a respective oxygen hose for supplying a gas comprising oxygen to the respective oxygen mask; at least one fixing clip. Each of the at least one fixing clip comprises a lanyard fixing portion and at least one C-shaped oxygen hose fixing portion for releasably holding one or more oxygen hoses. For each of the at least one fixing clip, the aircraft emergency oxygen supply system comprises a lanyard having a first end, which is fixed at the compartment, and an opposing second end, which is fixed to the lanyard fixing portion of the respective fixing clip.

A regulator assembly for an aircrew breathing mask is provided The regulator assembly includes a support, a mode selection knob movable between a first position, a second position and a third position, the mode selection knob comprising a base pivotably mounted on the support with respect to an axis of rotation, and a cover supported by the base. The cover can be movable relative to the base between a locked position of the mode selection knob and an unlocked position of the mode selection knob, the locked position locking the rotation of the mode selection knob from the second position to the third position, the unlocked position permitting rotation of the mode selection knob from the second position to the third position.

A regulator assembly for an aircrew breathing mask is provided The regulator assembly includes a support, a mode selection knob movable between a first position, a second position and a third position, the mode selection knob comprising a base pivotably mounted on the support with respect to an axis of rotation, and a cover supported by the base. The cover can be movable relative to the base between a locked position of the mode selection knob and an unlocked position of the mode selection knob, the locked position locking the rotation of the mode selection knob from the second position to the third position, the unlocked position permitting rotation of the mode selection knob from the second position to the third position.

A monitoring system (100″) is for aeronautical personnel (99), such as aircraft operators, pilots, co-pilots or passengers of airplanes or aircraft, such as aircraft or helicopters of civil or military aviation, passenger aircraft in scheduled or charter traffic, in particular also ultra-fast aircraft. The monitoring system includes a sensor system (60) for a measurement-based monitoring of the gas concentration. The operation of the monitoring system (100″) can be configured by an external input/output unit (450) or an external output unit (460).

A monitoring system (100″) is for aeronautical personnel (99), such as aircraft operators, pilots, co-pilots or passengers of airplanes or aircraft, such as aircraft or helicopters of civil or military aviation, passenger aircraft in scheduled or charter traffic, in particular also ultra-fast aircraft. The monitoring system includes a sensor system (60) for a measurement-based monitoring of the gas concentration. The operation of the monitoring system (100″) can be configured by an external input/output unit (450) or an external output unit (460).

A mask system includes a headphone part having two ear cups and an elastic headband bearing the ear cups, an oxygen mask part having an oxygen mask arranged pivotably on the headband, and a spectacles part having protective spectacles arranged pivotably on the headband. The oxygen mask part can make the oxygen mask, with headband mounted on a head, move into a usage setting and a rest setting. The oxygen mask, in the usage setting, covers a mouth and nose of a user and, in the rest setting, lies at least partially above the headband mounted on a head. The spectacles part can make the protective spectacles, with headband mounted on the head, pivot into a usage setting and a rest setting. The protective spectacles, in the usage setting, cover the eyes of a user and, in the rest setting, lie at least partially above the headband.