Hello again beloved reader. For the past few weeks we've been having fun playing with air quality sensors. Now, if you speak to the people who sell air quality sensors they'll tell you that unless your sensor cost you a load of money, it's probably going to be pants. If you speak to the intrepid geeks at Connected Humber on the other hand you'll know that we have to see something to believe it, so true to form we have been building our own...
The parts bill for our prototype AQ sensor is currently around thirty quid, and if you want to read more about our exciting adventures check out the air quality tag on this blog.
"But Connected Humber, are your sensors accurate?" I hear you ask. Well, we invite you to see for yourself.
The graph at the top of this post shows PM2.5 (fine particulate matter) measured by our test sensors in Hessle (blue), Kingswood (red) and Cottingham (yellow). The green line shows PM2.5 measured by the Council's monitoring station at Freetown Way in Hull. The Freetown Way data is ratified by DEFRA. The DEFRA data is an hourly average, so it will miss many of the short duration changes we see on our sensors as we measure every six minutes. You will however notice that the traces are pretty similar. It looks like our devices are pretty credible. Happy days!