Air Gradient Monitors

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Dan Hinckley

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Sep 23, 2026, 10:28:05 PM (3 days ago) Sep 23

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I'd be interested to hear of anyone's experiences with these units.

My PurpleAir units keep failing so I am looking around.

Vince Skahan

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Sep 23, 2026, 10:54:56 PM (3 days ago) Sep 23

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Davis Airlink at about the same price works fine as well if you’re looking at other alternatives.

Andy

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Sep 24, 2026, 7:54:10 AM (3 days ago) Sep 24

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Mine is two years old and still working. This one. Other than the time the firmware upgrade had issues, it has been good. Seems to line up with the purple air monitors in the area.

You can see it on the map and I have it in Home Assistant.

I built a several sensors using pm5003 sensors from aliexpress and some plans from here (which seem to be gone). None of them lasted and I assume the pm5003 units were fake.