I have two AirBeam2 sensors and the PM readings don’t match. Why?

Sometimes two sensors measuring in the same place at the same time don’t give the exact same readings. There a number of possible reasons for this:

1. It could be due to something your students are doing (for example, covering the air inlet or exhaust)
2. One sensor might be dirty or damaged
3. It can also be due to how the sensors were built

It’s a good idea to operate the sensors together for a while to learn how the readings compare before separating them to measure in two different places.  This presents a great opportunity for your students to collaboratively read and compare sensor measurements.