I got the uHoo Air Quality Monitor[1] and I love it. One of the few nice smart-home/app ones to monitor carbon monoxide too. But it's pricey. I can probably get some discount codes from them if the HN community is interested (I've spoken with their team once before in Singapore and they were very nice and accommodating!)
I have this one too, but yeah, it was expensive when I got it and has only gone up. I also don't love the dependency on a remote cloud.
What I'd like is a box which would just host an HTTP endpoint on my wifi network, and respond with a Prometheus metric endpoint (maybe throw JSON in there so it can give a "device specific" super accurate response too).
Let the community worry about the rest of the integration.
Hey, have you tested it much? This evaluation site shows weirdly low r^2 values of 0.0, but maybe they just haven't evaluated it. http://www.aqmd.gov/aq-spec/evaluations
I own this one as well. I’ve been pleasantly surprised at how well it works and how quickly I can see changes when it alerts me to a CO2 buildup and I go open some doors. It’s satisfying to be able to see the effect fresh air has on my environment watching their charts.
I picked this one because it also monitors Nitrogen Monoxide which gas stoves give off which many other air monitors do not test for.
I haven’t tried their IFTTT integration though, that will be next.
[1] https://getuhoo.com/