One of my First Alert Carbon Monoxide Alarm’s expired. This gave me an opportunity to look inside and see what’s inside this little gadget.
Here is a picture of the tear-down for those who are interested:
First Alert - Single Station Carbon Monoxide Alarm - model #: CO614
The specification for the carbon-monoxide sensor used in this model can be found here.
Here is a list of alternative carbon-monoxide sensors from Figaro.