Until someone brings in a charcoal briquette barbecue.![]()
But those organic materials are not pure carbon - they will give off other gases and particles if they burn and a smoke alarm will detect that. The primary reason for CO detectors is to detect malfunction in ventilation of gas burning appliances where they don't give off other particles during the combustion process. If you don't have such appliances there is not much need to detect this gas.170810-2355 EDT
Most homes contain a lot of organic materials. Organic materials contain carbon. Thus, burning of organic materials may produce CO and/or CO2.
How do most CO detectors work, and are they selective to only CO? A heated resistive component (a thermistor for example) can detect CO or any combustable gas.
I don't know what commercial detectors use.
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But those organic materials are not pure carbon - they will give off other gases and particles if they burn and a smoke alarm will detect that. The primary reason for CO detectors is to detect malfunction in ventilation of gas burning appliances where they don't give off other particles during the combustion process. If you don't have such appliances there is not much need to detect this gas.
Car in the garage - if you don't have ventilation you are going to set off such detectors frequently I would think. I also think opening the overhead door is going to provide sufficient ventilation - bottom line don't run the car with the door closed. If you were trying to kill yourself by running the car in a closed garage then you will just be upset when the CO alarm interrupts your process:ashamed1:
170811-1606 EDT
An interesting product and datasheet. https://cdn.sparkfun.com/assets/learn_tutorials/1/4/3/CCS811_Datasheet-DS000459.pdf
I did not find a discussion about the theory of operation, but it appears to be based upon a heated element and a resistance change. In other words a temperature rise greater than what would occur from just self heating of the sensing element.
In other searches I found that, based on qualitative experiments, some commercial residential CO alarms do not work. None of those websites discussed any absolute reference for the measurements. Also, some devices had time constants so long before an alarm that you could be dead first.
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Ok. This is a condo. No garage.
No chance of CO. unless someone hooked up a hose to a car and dragged it to the third floor.
:- /
Thank you both for the info. Appreciated.