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Cheap Chinese Air Quality Monitor Teardowns

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Deodand2014:
Teardowns of a pair of Chinese 'Air Quality' monitors that don't live up to their claims...

AnalogueLove1867:
Maybe the design is calibrated with Chinese air as a "normal" reference point  :-DD

SiliconWizard:
https://aqicn.org/map/china/

Well, it's not good but many other countries are not really any better now. ::)

Other than that, not really surprised. Good sensors are expensive.

AnalogueLove1867:

--- Quote from: SiliconWizard on July 05, 2022, 07:23:08 pm ---https://aqicn.org/map/china/

Well, it's not good but many other countries are not really any better now. ::)

Other than that, not really surprised. Good sensors are expensive.

--- End quote ---


You do realize that this is Chinese data about their own country. The same country that from the very beginning denied that Corona was even an issue.
 Along with their own completely fabricated death statistics. A country where Olympians, reporters and scientists just magically disappear, never to be seen again.
They were burning so many bodies during their initial pandemic that it was detected by satellite lol. And 20 million people just stopped paying for their phone plans.
A guy I know who acted as an intermediary for an Australian instrument company was stuck in China for ages. When travelling through the more rural parts
 he noticed many  evenly spaced out dead bodies on the side of the road. Then a week or so later they were officially informed of the virus. It was hell.

thm_w:
There are some name brand sensors as well that give an "eCO2", which is their estimate of CO2 but not directly measuring it.
Then of course manufacturers just take this and display it as CO2 level with no disclaimer, that it is an estimate only and needs proper calibration.

But this is obviously way worse.. surprising.

Probably the best ones to buy on Ali then are the original designs that all came in a clear case so you can see the sensors.

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