Nice topic sir. I included a metal oxide smoke and sensitive chemical detector in my final university project, the smart home. During the presentation phase, people were all gazing at me and my team when we demonstrated how sensitive the device were when placed far away from a little gasoline generator.

The fact still remains that this guy is a silent killer and we're exposed to it often and that is why I always take pity at guys stuck in traffic cause if a carbon monoxide meter is taken around such area, we would see that the emission is quite high. Even though it might not kill at such point, the result is cumulative.

Thanks buddy and kudos