An unofficial test of a First Alert Model CO606 Carbon Monoxide Detector. After I made this video, I found another video which confirmed my findings. [ Ссылка ]

There they say Fire Fighters put on masks at 35 ppm CO! (Whereas the First Alert won't alarm until 400 ppm.) In the aforementioned video, they show a unit which responds very quickly, Exactly what I was looking for.

The NSI 3000 looks to be a good deal. The biggest bang for your buck. See [ Ссылка ]

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