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I might get one.
I measured CO2 levels on a plane: It showed me when I was most likely exposed to COVID
Air travel amid COVID outbreaks can be unnerving but a carbon dioxide detector can help gauge risks. Here's what a CO2 detector showed on a flight.www.yahoo.com
It’s a good tool for determining potential risk, but if you’re in a crowded indoor environment carrying a co2 monitor it won’t tell you anything you don’t already know. It’s a better tool for demonstrating to teachers, business owners, etc when they NEED to consider opening doors and windows to ventilate indoor spaces to lower the risk. On a plane there’s absolutely nothing you can do with that information other than wear a respirator, which you should already be doing. FWIW, the author’s mask looks ineffective, IMHO.