Dataset associated with "Laboratory Evaluation of Low-cost PurpleAir PM Monitors and In-field Correction using Co-located Portable Filter Samplers"

Jessica Tryner (1), Christian L'Orange (1), John Mehaffy (1), Daniel Miller-Lionberg (2), Josephine C. Hofstetter (2), Ander Wilson (3), John Volckens (1)*
 
1. Department of Mechanical Engineering, Colorado State University, 1374 Campus Delivery, Fort Collins, Colorado 80523
2. Access Sensor Technologies, 2401 Research Blvd, Suite 107, Fort Collins, Colorado 80526
3. Department of Statistics, Colorado State University, 1801 Campus Delivery, Fort Collins, Colorado 80523

*Please contact John Volckens (john.volckens@colostate.edu) regarding this dataset.

See the manuscript for details on data collection, quality control, and analysis. (Citation to be added.) 

This folder contains log files reocrded by PurpleAir (PA-II-SD) monitors (www.purpleair.com). These data were collected either (a) in a laboratory aerosol chamber at Colorado State University (on 2018-08-20, 2018-08-21, 2018-12-17, and 2018-12-18) or (b) outdoors in Fort Collins, Colorado, USA (between 2018-08-22 and 2018-12-06).  Each file name has the format "PA-XXX-YYMMDD", in which "XXX" is the identifier assigned to the PurpleAir monitor (002 through 020) and "YYYYMMDD" is the date on which the data were recorded. Data were logged every 80 seconds.  

Each log file includes the following columns:

1. UTCDateTime - the date and time in UTC (YYYY/MM/DDTHH:MM:SSz),
2. mac_address - the MAC address of the WiFi module on the sensor,
3. firmware_ver - firmware version of the control board,
4. hardware - hardware the control board has detected,
5. current_temp_f - temperature (Fahrenheit),
6. current_humidity - relative humidity (%),
7. current_dewpoint_f - calculated dewpoint (Fahrenheit),
8. pressure - absolute pressure (millibar),
9. adc - the voltage reading on the analog input of the control board,
10. mem - free HEAP memory on the control board,
11. rssi - WiFi signal strength (dBm),
12. uptime - firmware uptime (s),
13. pm1_0_atm - PM1.0 concentration reported by PMS5003 sensor "A" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
14. pm2_5_atm - PM2.5 concentration reported by PMS5003 sensor "A" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
15. pm10_0_atm - PM10 concentration reported by PMS5003 sensor "A" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
16. pm1_0_cf_1 - PM1.0 concentration reported by PMS5003 sensor "A" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
17. pm2_5_cf_1 - PM2.5 concentration reported by PMS5003 sensor "A" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
18. pm10_0_cf_1 - PM10 concentration reported by PMS5003 sensor "A" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
19. p_0_3_um - number concentration of particles larger than 0.3 micrometers as reported by PMS5003 sensor "A" (number per liter),
20. p_0_5_um - number concentration of particles larger than 0.5 micrometers as reported by PMS5003 sensor "A" (number per liter),
21. p_1_0_um - number concentration of particles larger than 1.0 micrometers as reported by PMS5003 sensor "A" (number per liter),
22. p_2_5_um - number concentration of particles larger than 2.5 micrometers as reported by PMS5003 sensor "A" (number per liter),
23. p_5_0_um - number concentration of particles larger than 5.0 micrometers as reported by PMS5003 sensor "A" (number per liter),
24. p_10_0_um - number concentration of particles larger than 10 micrometers as reported by PMS5003 sensor "A" (number per liter),
25. pm1_0_atm_b - PM1.0 concentration reported by PMS5003 sensor "B" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
26. pm2_5_atm_b - PM2.5 concentration reported by PMS5003 sensor "B" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
27. pm10_0_atm_b - PM10 concentration reported by PMS5003 sensor "B" and labeled "ATM" in the PurpleAir log file (micrograms per cubic meter),
28. pm1_0_cf_1_b - PM1.0 CF=1 concentration reported by PMS5003 sensor "B" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
29. pm2_5_cf_1_b - PM2.5 CF=1 concentration reported by PMS5003 sensor "B" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
30. pm10_0_cf_1_b - PM10 CF=1 concentration reported by PMS5003 sensor "B" and labeled "CF1" in the PurpleAir log file (micrograms per cubic meter),
31. p_0_3_um_b - number concentration of particles larger than 0.3 micrometers as reported by PMS5003 sensor "B" (number per liter),
32. p_0_5_um_b - number concentration of particles larger than 0.5 micrometers as reported by PMS5003 sensor "B" (number per liter),
33. p_1_0_um_b - number concentration of particles larger than 1.0 micrometers as reported by PMS5003 sensor "B" (number per liter),
34. p_2_5_um_b - number concentration of particles larger than 2.5 micrometers as reported by PMS5003 sensor "B" (number per liter),
35. p_5_0_um_b - number concentration of particles larger than 5.0 micrometers as reported by PMS5003 sensor "B" (number per liter),
36. p_10_0_um_b - number concentration of particles larger than 10 micrometers as reported by PMS5003 sensor "B" (number per liter),

Recommended citation: (to be added).