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| vendor | item | notes |
|---|---|---|
| Piera | IPS-7100 | https://pierasystems.com/products/piera-7100-intelligent-particle-sensor/ only $100 and unlikely to give the performance we need but does claim to give particle size histogram |
| Plantower | PMS5003 PA-II/PA-II-FLEX | https://www.plantower.com/en/products_33/74.html https://pubs.acs.org/doi/epdf/10.1021/acs.estlett.3c00030 - does better (allegedly*) than IPS-7100 at <1 micron *has been found to not always adhere to manufacturer guarantees Best coefficient of determination found so far, leading competitor of Piera IPS-7100, used by Forest Service |
| Piera | Canaree R1 | https://www.aqmd.gov/aq-spec/sensordetail/piera-systems---can%C4%81ree-r1 Better coefficient of determination, same manufacturer as IPS-7100 |
| FabLab | Smart Citizen Kit V2.1 | https://www.aqmd.gov/aq-spec/sensordetail/fablab---smart-citizen-kit-v2.1 Highest coefficient of determination at PM1.0, higher price |
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