Foobot also called your good air guru and maybe it is a good guru, thanks to all of its sensors. One of the most powerful device on the market that it is actually available to order right now is equipped with a great variety of sensors like a tVOC: Volatile Organic Compounds (Formaldehyde, Benzene, Xylene,Toluene etc.), PM2.5, PM5 and PM10 Particulate Matte, CO2/CO Conversion from tVOC/Cross sensitivity of tVOC sensor and of course Temperature and Humidity (Full Datasheet).
They have came up with a great design, very futuristic and this is actually the second version of a formerly Alima. The only negative part of the device itself is the plastic case. They use an ABS Glossy and rubber finish which I am not a big fun, hopefully in the future they will have the budget for an Aluminium case.
A gesture friendly device that allows you to check air quality with and without internet connection or a smartphone by just turning it upside down or by tapping it. The RGB LEDs will change colour between 6 levels of orange/blue.
They also have an API that allows to see and export the data on a computer in case you are an advanced user and you need to study the data in a more sophisticated way, although the app for iOS and Android is well build with history browsing, instant readings and alerts or advices to improve your indoor air that getting better over time thanks to machine learning.
Nowadays a product is nothing without a good support from the company. They are active socially through Twitter and Facebook and you can always reach them and ask them questions about their product. Also their Blog is an awesome place (like mine) to learn how to improve your indoor air quality, one of the best article that I really love is Cigarette smoke – Polluting your indoor air.
And as they say, have safe breathing days.