Weather Station Hardware > Air Quality Sensors

Purpleair Range

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azchrisf:
Does anyone know or have a guess as to how big of a circumfrence this sensors measurement would be valid for?
I'm assuming the results are good for at least 1/2 mile.

IIRC the AirNow stations does miles in each direction.

ConligWX:
not sure you can really range the sensor, but some more pdf's here:

http://www.aqmd.gov/aq-spec/product/purpleair-pa-ii

Eno:
Depends on what kind of site the sensor is located in.  High density urban?  Heavy industrial?  Rural, open country?

Probably either what EPA terms "Middle Scale", where sensors would show show significant differences between locations that are ~0.1 to 0.5 km apart, or I'm guessing more common would be "Neighborhood Scale" 500 m to 4 km.

azchrisf:
Suburban.

Forever:
Like with our weather stations it is only really accurate for the location it's installed.

You may have a source of pollutant that my not exist only a few hundred feed away or vice versa.

Looking at the PurpleAir map I tend to have readings close to the sensors around me but as the distance grows so can the difference in the readings.

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