...
| 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 $200, best coefficient of determination found so far, leading competitor of Piera IPS-7100, used by Forest Service It's the algorithm that puts this one so high |
| Piera | Canaree R1 | https://www.aqmd.gov/aq-spec/sensordetail/piera-systems---can%C4%81ree-r1 Better Great coefficient of determination, same manufacturer as IPS-7100, built for Ethernet, $300 |
| FabLab | Smart Citizen Kit V2.1 | https://www.aqmd.gov/aq-spec/sensordetail/fablab---smart-citizen-kit-v2.1 Highest guaranteed coefficient of determination at PM1.0, $120 |
| Sensirion | SPS30 | https://www.sparkfun.com/products/15103 Cheap $50, similar performance to leaders |
A potential non-commercial option from NASA is MPASS: https://technology.nasa.gov/patent/LEW-TOPS-19 → Could send them an email to see if it's an option for us.