Almost all stations are showing ZERO READINGS [1000015476]

I don’t know what effect cold air has on PurplrAir stations, but at this time of year, air can be relatively clean, especially crisp, cold Arctic air on clear days. So, that’s ONE reason for the very clean air pollution readings. If you get a bad air inversion that holds on tight, any factory smog…

bumchamp7 has a good point, but see previous message stream on the subject: [image] Sensor failure in cold Sensors Last night I heard a very strange chirping sound out our back door. On further inspection, the sound was coming from the PA sensor. There was a (blue?) light …

I installed a Zen last month in New Hampshire and am displaying its PM2.5 AQI along with my weather station value. On nights with a (cold) NW wind we don’t get an air inversion and the air is clean. On clear nights we get an inversion, but there is a down slope draft of cooled air from the hill nort…

Cold air affect readings or sensors

Sensors

Kenneth_Beck (Kenneth Beck) January 18, 2024, 7:24pm 5

bumchamp7 has a good point, but see previous message stream on the subject:

Topic		Replies	Views
Is PurpleAir reading effected by blowing snow? Sensors	2	734	February 13, 2023
Not so sure these reflect actual air qual Sensors	3	161	September 26, 2025
Sensor showing zero PM2.5 and PM10 Sensors	2	669	February 6, 2023
Air Quality Fluctuations General	3	61	December 19, 2025
Sensor Installation Sensors	0	7870	February 27, 2023

Cold air affect readings or sensors

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