It takes you around one hour to build the sensor, if you have everything.
Here is the assembly guide
airRohr Sensor Kit
Your sensor will measure 24 hours per day and 7 days a week - all year long.
Of course, you can then get involved in a local Sensor.Community group to promote the Open Data and the digital empowerment among your fellow citizens. You can find the local community on our Maps.
If you have programming skills you can help us on GitHub.