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PurpleAir PA-II-FLEX

General Description

The PurpleAir PA-II-FLEX sensor is an air quality monitoring device that provides real-time measurements of PM1.0, PM2.5 and PM­10 mass concentrations and environmental parameters such as temperature and relative humidity. Data can be accessed and downloaded on the PurpleAir website.

Principle of Operation

The PurpleAir PA-II-FLEX sensors use dual Plantower PMS6003 laser particle counter, where laser beams detect particles by their reflectivity. These sensors count suspended particles in sizes of 0.3, 0.5, 1.0, 2.5 and 10 μm. These particle counts are processed by the sensor using a complex algorithm to calculate the PM1.0, PM2.5 and PM10 mass in μg/m3. The PMS6003 sensors come factory calibrated.


  • Dimensions: 85 (L) x 85 (W) x 125 (H) mm
  • Weight: 12.6oz (357g)
  • Power supply: Yes, 5V DC micro USB, 0.18A continuous, 600mA peak
  • Battery: No
  • Clock function: Yes
  • Sampling mechanism: fan
  • Environmental operating conditions: N/A
  • Internal data logging: Removable SD card
  • Data communication: Wi-Fi
  • Data logging/retrieval: Data can be retrieved on the PurpleAir website or API
  • Weatherproof: Yes, IP68


  • Outdoor air quality monitoring
  • Indoor air quality monitoring
  • Smart Cities
  • Community Projects
  • Wildfire Monitoring

Developer's Product Webpage

    South Coast Air Quality Management District

    21865 Copley Dr, Diamond Bar, CA 91765



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