The sensors between the older HP04 and newer 07/09 seem very different in terms of sensitivity and what is detected.
I’ve noticed that the 07/09 is extremely sensitive to VOC and takes a long time to come back down whilst not registering NO2 at all. Where as on the 04 as soon as I open the door NO2 spikes (living near a main road I’d expect it to) but VOC doesn’t spike or remain for long when using perfume etc..
See screen shots as an example of NO2, 04 and 07 in the same room.
Anyone else seeing this?
(Edited by moderator – Tags added)