Hi, I have 3x ONE V9. The first one was from January 24 and was fully assembled; the other two were purchased as kits and arrived today. All run 3.1.3.
The old one (assembled) shows slightly higher PM1/2.5/10 readings and a much higher PM0.1 count (see the attached screenshot). First, they were in the same room, then I put them outside next to each other to calibrate CO2 and took the attached screenshot.
When they were indoors, and I blasted our air purifier to the max, all µg/m3 PMs went to zero after a few minutes, but PM0.1 counts were around 150 on the new ones and 400+ on the old one.
Is this normal? Do I have different sensors, or is the assembled one somehow calibrated? All the other sensors show identical readings.
Thanks!
