co2 detector - high or low in cockpit?

Discussion in 'Flight Following' started by Mxfarm, Nov 26, 2022.

  1. Mxfarm

    Mxfarm Line Up and Wait

    Joined:
    Aug 15, 2007
    Messages:
    695
    Location:
    KPTS, 1K4, H17

    Display name:
    Marc
    What’s the simple answer to if a co2 detector should be high, low or otherwise in the cockpit?
     
  2. Cap'n Jack

    Cap'n Jack Final Approach

    Joined:
    Jun 25, 2006
    Messages:
    8,581
    Location:
    Nebraska

    Display name:
    Cap'n Jack
    Someplace where you can see it.

    I'd worry more about CO than CO2.
     
    Martin Pauly, Jim K and Mason like this.
  3. asicer

    asicer Final Approach

    Joined:
    Jan 1, 2015
    Messages:
    8,490

    Display name:
    asicer
    Yeah, I'd hate for the alarm to go off just because I cracked open a can of soda. :)
     
    Domenick likes this.
  4. Bell206

    Bell206 Final Approach

    Joined:
    Oct 6, 2017
    Messages:
    6,789

    Display name:
    Bell206
    The recommended location is on the instrument panel in view of the pilot. If it is an adjustable type detector, its also recommended to lower the trigger point from the FAA limit of 50ppm to 35ppm.
     
  5. TooTall

    TooTall Pre-Flight

    Joined:
    Sep 26, 2019
    Messages:
    38
    Location:
    lafayette, La

    Display name:
    Too Tall
    There's a myth that carbon monoxide alarms should be installed lower on the wall because carbon monoxide is heavier than air. In fact, carbon monoxide is slightly lighter than air and diffuses evenly throughout the room.
     
  6. Timbeck2

    Timbeck2 Final Approach

    Joined:
    Nov 4, 2015
    Messages:
    8,924
    Location:
    Vail, Arizona

    Display name:
    Timbeck2
    Mine is mounted next to where the old tach came out of on my Cherokee which is lower panel next to the throttle quadrant.
     
  7. Mxfarm

    Mxfarm Line Up and Wait

    Joined:
    Aug 15, 2007
    Messages:
    695
    Location:
    KPTS, 1K4, H17

    Display name:
    Marc
    correct CO not CO2.
     
    Cap'n Jack likes this.
  8. Mxfarm

    Mxfarm Line Up and Wait

    Joined:
    Aug 15, 2007
    Messages:
    695
    Location:
    KPTS, 1K4, H17

    Display name:
    Marc
    does CO’s weight vary with its temp?
     
  9. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Touchdown! Greaser! PoA Supporter

    Joined:
    Jun 7, 2008
    Messages:
    14,857
    Location:
    DXO124009

    Display name:
    Light and Sporty Guy
    Yes, the density changes. But so does air.

    Air is about 29 grams / mole, CO is 28ish. So not really much difference
     
    Mxfarm likes this.
  10. Randomskylane

    Randomskylane Pre-takeoff checklist

    Joined:
    Jun 2, 2021
    Messages:
    293

    Display name:
    Randomskylane
    Mine went off one day and I had no idea what was making that racket

    great early warning system as I had a short in the panel. The smoke wasn’t visible until later so it really saved my bacon before something lit off
     
    Piperonca likes this.
  11. Domenick

    Domenick Cleared for Takeoff

    Joined:
    Sep 11, 2019
    Messages:
    1,255

    Display name:
    Domenick
    CO2 (carbon dioxide) is heavier then air and is often confused with CO (carbon monoxide).
     
  12. Dan Thomas

    Dan Thomas Final Approach

    Joined:
    Jun 16, 2008
    Messages:
    9,540

    Display name:
    Dan Thomas
    The CO detector should be somewhere that air is moving around at least a bit, and not in a place where a draft of clean outside air gets at it.

    In the G1000 system there's a CO detector hidden behind the pilot's flight display. Not normally a good spot, but the PFD and MFD have cooling fans that move considerable air around back there, making sure that CO anywhere nearby will get at the detector.