Interesting. Coincidentally just installed the Aithre Shield EX 2.0 behind the Dynon HDX in my RV12 this past week. It's nice having a 'set it and forget it' install with alerts.
Don't forget it, test it!
It gets tested every time the fuel truck arrives.
I use the Aithre in my own airplane and with my panel installs.
I am curious. Can blood oxygen measurements by an apple watch be used to detect carbon monoxide poisoning?
Either way I do agree that we don't need another regulation on this. Knowing the FAA they will require one in my open cockpit DR-1 ... .
Oliver
I personally have a home battery operated unit in my RV. Just make sure the detector is less than 10 years old.
Can I Use a Home CO Detector for Aircraft?
No, that is a bad idea. A typical CO home detector will not suffice as it will alarm too late for such a small confined space. A home CO alarm is programmed to alarm at 70 ppm in 60 minutes. This is way too slow and the alarm trigger point is too high.
Residential Detectors
There are dozens of household CO detectors, some with prices not much above those of the chemical spot detectors. We do not recommend any of the residential detectors as most follow Underwriters Laboratories spec UL-2034, which requires a time delay before the unit will alarm once a given level of CO is present. That’s to cut down on calls to 911 for false alarms. Under the UL spec, if the unit has a digital readout, it cannot show CO concentrations below 30 PPM. The unit will not sound an alarm until CO reaches 70 PPM and remains there for four hours. At a concentration as high as 400 PPM, the unit will generally not alarm for 15 minutes.
Given the effect of flight at altitude in combination with low-level CO poisoning, we think it’s quite likely a pilot would be incapacitated well before a household detector would alarm in flight.
Surprised the flight data systems GD-40 hasnt been mentioned. Good for ten years and wires into the Garmin system.
http://www.fdatasystems.com/gd-40-co-detector
If you go west, VFR, from the eastern parts of the country, after a while you'll see the mountains in the distance. That is a helpful CO detector.
Dave
Boulder, CO
If you go west, VFR, from the eastern parts of the country, after a while you'll see the mountains in the distance. That is a helpful CO detector.
Dave
Boulder, CO
For those that use a CO2 detector with the G3X system. The CO2 detector shows being connected to the GDU460 via an RS-232 bus. The G3X diagram shows the audio will then be ported from the GDU-460 to the GMA245 via wiring. The Garmin manual also states the CO2 message traffic will be shared from the GDU460 via the CAN bus.
The question is, will the audio alert still transfer from the GDU460 to the GMA245 if the CO2 detector is linked into a 2nd GDU460 on the CAN bus that is not directly ported into the GMA 245 (PFD vs MFD sort a speak).
Whew, that was a mouthfull of numbers. I'll call the G3 experts monday, but thought it worth asking. Sorry for the scope creep, trying to update a drawing diagram and curious if this path works.
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I listened to the Hypoxia talk at Oshkosh 2021, it was very informative.
One thing I didn't know is that the onset of hypoxia cannot be self diagnosed.
I listened to the Hypoxia talk at Oshkosh 2021, it was very informative.
One thing I didn't know is that the onset of hypoxia cannot be self diagnosed.
If one thinks they will be able to tell if they are having the early symptoms and be able to open up a vent and prevent hypoxia, the real life data does not show this. I think the euphoria one gets during the early stages overwhelms the ability to self detect.
John,
Respectfully, I think you're confusing basic hypoxia with carbon monoxide (CO) poisoning. Stated simply, hypoxia is a deficiency in the amount of oxygen (O2) reaching body tissues. There are 6 different types of hypoxia, each brought about by different conditions external or internal to the body.
In the USAF, we hit the altitude chamber every 4 years specifically to experience our own personal hypoxia symptoms, and how they change over time. It was that very training that helped me recognize my own hypoxia event in the F-4, which I dealt with immediately as I was trained. My symptoms: An unusual warm feeling all over, fuzzy stars along the visual periphery with associated gray tunneling, loss of color acuity, and cyanosis (purpling) of my fingernails. I gang-loaded my O2 regulator to 100%/Emergency, and fealt better immediately. That was hypoxic hypoxia, a general lack of sufficient oxygen to the body. The onset of most hypoxia symptoms can most definitely be diagnosed...
...but not always.
Carbon monoxide causes hypemic hypoxia, when the body is unable to transport a sufficient supply of the oxygen that is available. Because the CO molecules 'displace' the O2 molecules in the red blood cells, they reduce the amount of O2 being carried to the brain, eyes, and tissues. Hypoxia from CO poisoning is much more insidious than other forms of hypoxia. It impairs the brain's functions, judgement, and mental faculties such that you cannot mentally process that it's happening to you, what to do about it, or even recognize that something must be done. Replenishing the lungs with O2 may not clear up the problem, depending on how much CO has been absorbed by the red blood cells--there's no room for the good O2 molecules.