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A comment on Building the Pocket CO2 Project. Parent comment

Re:Building the Pocket CO2 Project by dallyo on Thursday April 27, 2023 @06:15AM (#35725858)
Second this. It's possible that the 3000 reading is triggered by something else. They should try rubbing sanitiser on their hands and then holding the device - if it goes crazy then it's not directly sensing CO2.
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Re:Building the Pocket CO2 Project by jrockway on Saturday April 29, 2023 @04:04PM (#35756614)
I sort of did this test last night. I assume that VOCs include ethanol, so I mixed up some drinks near the monitor. VOCs went from ~60ppb to a peak of 579ppb. CO2 remained constant at about 640ppm.

I am less surprised than other people that making an open fire indoors increases CO2 levels. Where do the combustion byproducts go if not into the air.

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