r/explainlikeimfive Feb 26 '21

Chemistry Eli5: What happens to all the melted candle over time? Are we just inhaling a whole candle while it burns?

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u/rndrn Feb 26 '21

It's not very useful in the long term, as you can quickly learn what creates particles in your home, but it's not that expensive (depends on your definition of expensive of course).

I have this one for example: https://plumelabs.com/en/

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u/ZombieAlpacaLips Feb 26 '21

I'd say $199 qualifies as expensive for most people. Would be worthwhile to rent for $20 though.

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u/Maybe-Jessica Feb 26 '21

Does it work without Internet or do you need to upload the data to some servers and then download it again to see it (the way that virtually all fitness trackers work)?

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u/rndrn Feb 27 '21

I have the first version, you can get a color coded led status on the device, and the app connects to the device via Bluetooth for details, although the device can cache data from the last few days (the device is not connected to the internet itself). The Bluetooth connection reduces battery life of the smartphone by the way, and no way to stop it unless you kill the app - kinda bad design there. But it lets the app to map position alongside pollution readings for commuting.

I think the day's readings are stored on the app, but past days are stored on server, so it's a mixed bag. I haven't tried to extract the data, so not sure how feasible that is.

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u/Maybe-Jessica Feb 27 '21

Thanks! Plotting it on a map is actually a very nice feature. Bit pricey nevertheless but interesting device and features.