Right now there is a cloud of Sahara dust “raining” down on Germany.
Current measured values from kachelmannwetter
The purple on the legend starts at 50µg/m^3 but typical values are 100µg/m^3 and beyond.
In the meantime our low-cost sensors see the world through their eyes:
The trend is visible but the actual values are far too low.
I just wanted to share that observation because we don’t have these conditions that often.
An update: last night the next cloud of dust rained down over the Berlin/Brandenburg area. Peak values at 4am from the official stations:
At the location of my sensors the expected values should be close to PM2.5 = 57µg/m^3 and PM10 = 71µg/m^3
Here is the data from the airrohr sensor (SDS011 & SPS30)
And here is an SDS011 in the NAM enclosure (with heating)
Humidity plot for the same time (SHT35 with SF2 cap and the best BME280 I could find)
I feel this is a really good result and could be an interesting sidenote in the discussion that @Denis and @irukard have in another thread.
Note, that I do not know which SDS011 is currently build into the NAM. I tried several but they are all from end of 2020.
Thx for showing your data nephilim!
Would be nice if we could identify which curve was generated by which sensor.
Seems like the legend was cut off.
For the airrrohr data I assume: green → SDS011, orange → SPS30 ?
Exactly, and BME280 is green, SHT35 is orange.
EDIT: Fixed the images. The browser I used first is mediocre and does not display the legend. Everything is fine in chrome.