How does the electric carbon monoxide detector in cabin or cockpit on aircraft work?

  • $\begingroup$ You may find the Wikipedia article on Carbon monoxide detector informative. That article mostly talks about home detectors, but the technology is the same. $\endgroup$ Sep 14, 2017 at 3:27
  • $\begingroup$ Related, "Carbon Monoxide Detectors" on AVweb. $\endgroup$
    – mins
    Sep 14, 2017 at 7:30
  • 3
    $\begingroup$ The amount of fire-on-aircraft quesitons you are asking is worrisome :-) $\endgroup$ Sep 14, 2017 at 10:06
  • $\begingroup$ I am currently working on description and operation of fire detention systems for my first shop rotation. $\endgroup$
    – Myat Khant
    Sep 14, 2017 at 10:08
  • $\begingroup$ @MyatKhant: Good to know you're not an aspiring arsonist! :-P $\endgroup$
    – Vikki
    May 6, 2019 at 3:46

1 Answer 1


There are three major types of carbon monoxide senors.

  • Biomimetic: A gel changes color when it absorbs carbon monoxide.
  • Metal oxide semiconductor: When the chip's circuit detects carbon monoxide, electrical resistance decreases, and this triggers an alarm.
  • Electrochemical: Electrodes immersed in a chemical solution sense changes in current when they come into contact with carbon monoxide, and this change triggers the alarm.

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