I noticed that our Purple Air’s temperature reading looked off this morning at 48 F. I checked it against another digital sensor located next to it, which read 33 F. I also looked at two nearby Purple Air sensors, less than 1/2 mi away and they both read 33F.
This looks a lot like some kind of error that changed an internal offset, vs some kind of artificial warming of the unit. If I add the two nearby sensors to the graph, you can see that our sensor follows the same curve they do, just offset by 15 deg.
Just wanted to piggyback on this issue — I just installed new outdoor and indoor monitors and both are hovering 10° or more higher than actual temps. Our indoor temp, for example, is controlled at 63° (currently measured at 62° with another thermometer at the PA monitor’s location), yet this monitor’s temp sensor is logging 76°at the moment on PA’s map. Similarly for our outdoor sensor.
Looking at surround PA sensors in our area, some are registering what would seem to be more accurate outdoor temps (40s) while others are also registering significantly higher temps (60s).
So, to any and all PurpleAir employees, why did some sensors leap up 8-15 F on March 16? Is there a workaround to calibrate these sensors to match all the other PurpleAir sensors? I have three sensors, and they DO NOT agree with each other.
Hi William, sorry for the mistake in my earlier comment. The email address was incorrect (I’ve edited and corrected it). You will want to use the email email@example.com. Rest assured that we’re looking into this.
Did you get my email to firstname.lastname@example.org sent March 21, 2023 at 5:10 pm PDT? Here is what it said:
At your request, I am attaching two screenshots showing how on about March 16, the temperature jumped up about 12 degrees F, and the humidity dropped by a significant amount at the same time. This issue has persisted. My other sensors are unaffected.
Device address: [removed for privacy reasons]
Please let me know if there is a fix for this. And let me know if I can help further.