>>2947933
>>2950028
Not OP but this thread is relevant to my interests, so huh anyone knows if those cheap aliexpress monitors are decently accurate? I'm looking into first of all, making sure CO2 levels are within healthy levels. I'm interested in this one
>aliexpress.com/item/1005005056687536.html
Just as I was loading the tab on my browser to make sure it was the right url, I found this negative review
>

Unsurprising, I tend to stay away from chinkshit for health and/or critical applications, but money is tight as ever it is what it is. Can anyone recommend me a good and accurate 'air quality' monitor with the basics like CO, CO2 and what else? The cheapest, seemingly reliable one (made by an american company as a sort of 'libre' device, the kind that everyone can build on or check internals) was like $100, without shipping.