It's not just air quality sensors. Got some wifi thermostats some years back. Oops--they draw too much power. At least it's consistent, we set them two degrees above what we actually want and and they work fine.
And we also have an example of the problem of air circulation. We have a wireless thermometer (a quick check if it's cool enough to open the windows) that's in a weather enclosure that admits a decent amount of air and sitting under a tree (keeping it out of the sun and away from big masses of concrete--it's simply impossible to properly place it in our yard) and it can be up to two degrees off because of lag.
And we also have an example of the problem of air circulation. We have a wireless thermometer (a quick check if it's cool enough to open the windows) that's in a weather enclosure that admits a decent amount of air and sitting under a tree (keeping it out of the sun and away from big masses of concrete--it's simply impossible to properly place it in our yard) and it can be up to two degrees off because of lag.