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We shared this on Twitter and got this response:
my students have easily detected vaping signals on similar low-cost pm sensors. that being said, a high pm signal in a bathroom could also be from other sources (like cleaning products, or cleaning in general). would be happy to talk more.
— Brian Magi ([@brianmagi](/profile/brianmagi)) December 11, 2019
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Yes. In my opinion. They’ll catch the particles. The speed will depend on the degree of mixing , ventilation and the size of the restroom. You may not catch the caper but the next person using the restroom. pic.twitter.com/gdFaSnJCrV
— JPM ([@yeipijotape](/profile/yeipijotape)) December 11, 2019
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This is a really interesting question! I know that the plantower sensors are affected by vapor, humidity, aerosols, though how comparable those results are to other kinds of particulate matter I can't say ( but I'm sure someone else can). I did a very quick online search for "vaping and PM 2.5" and it does seem like some of the vaping products would produce vapor that is at least the right size to get picked up by the sensor-- they definitely get triggered in the presence of smoke , but am curious if non-smoking related bathroom activities might also set these off. If you set up an experiment we'd love to see the results!!
I don't know if this is helpful at all, but it shows a comparison of PM associated with e-cigarette vapors: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210766/
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