Yes, we also have a popular open-hardware, open-source indoor air quality monitor that measures CO2, PM, Temperature and Humidity. You can also get an optional TVOC module that can measure chemicals and NOx.

This version we currently only sell as a pre-soldered kit [1] but it is very easy to assemble (no need to solder anything) and you just need to plug a few modules together and close the enclosure with a few screws.

[1] https://www.airgradient.com/kits/

Their indoor version came first. I use several of them in my house and love them.

I particularly love the open source nature of them that allows me to redirect their data reporting to my own homebrew data systems.

About to buy some more of them, in fact.