Ask HN: Air Quality Monitor?

Was visiting in-laws over the holidays and they had purchased this Dyson Air Purifier[0] which displays live AQI readings. It was an eye-opener because the air quality fluctuated pretty dramatically throughout the day based on what whether someone was frying something in the kitchen, or the windows were open, someone downstairs was smoking, etc.

Now I want to purchase a monitor for our small apartment, but after 3 hours of searching I haven't found any that seem worth buying. I'm after something that will detect CO2, PM2.5, and VOCs. It should have some data logging/alerting/reporting capabilities as well either via Bluetooth or WiFi.

I'm aware of some models like Awair rev.2, AirVisual Pro aka "Node", and uHoo, Netatmo, and Airthings. But all of them seem to suffer from either poor quality control, or wildly inaccurate sensors- to the point of being useless.

Anyone have a suggestion for a well-made, accurate sensor?

[0] https://www.dyson.com/purifiers/dyson-pure-cool-desk-white-silver.html