Which hazardous gas should be monitored with a simple alarm device similar to a smoke detector?

Carbon monoxide is a hazardous gas that should be monitored with a simple alarm device, much like a smoke detector, due to its colorless, odorless nature and the serious health risks it poses. Carbon monoxide can accumulate in enclosed spaces, often as a result of faulty heating equipment, vehicle exhaust, or other combustion sources.

When inhaled, it can interfere with the blood's ability to carry oxygen, leading to potentially life-threatening conditions such as carbon monoxide poisoning. An alarm device similar to a smoke detector can provide early warnings, allowing individuals to evacuate or take action to reduce exposure. This is particularly important in residential settings, workplaces with combustion equipment, or any environments where carbon monoxide could accumulate.

The other gases listed, such as ozone, nitrous oxide, and carbon dioxide, present their own dangers and require monitoring; however, their monitoring typically involves different strategies and technologies rather than simple alarm devices meant for immediate alerting like those used for carbon monoxide detection. Therefore, the focus on carbon monoxide specifically underlines the critical nature of its monitoring in safeguarding health and safety.