The website of Luftdaten.info has no english explanation or instructions on how to assemble the particle matter sensor, yet. But I made a rough translation and put it into a google doc. You can acess it here and if you want you can also make some changes.
For some english explanations of this project see my blog entry or look at this very good article in Open Source.
You might also try this incomplete git-hub description.
Tags: english, Feinstaub, instructions, IoT, particle matter, Sensor