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PM Sensor Evaluations

South Coast AQMD’s AQ-SPEC program aims at being the testing center for low cost air monitoring sensors to establish performance standards by which sensors are evaluated. The program evaluates sensors in both controlled laboratory conditions and in the field. In the field, sensors are tested alongside one or more of South Coast AQMD’s existing air monitoring stations using traditional federal reference/equivalent method instruments to gauge overall performance. Sensors demonstrating acceptable performance in the field are then brought to the AQ-SPEC laboratory for more detailed testing in an environmental chamber under controlled conditions alongside traditional federal reference/equivalent method and/or best available technology instruments.

PM Sensors
Sensor
Image		 Make
(Model)		 Est. Cost
(USD)		 Pollutant(s) *Field R2 *Lab R2 *Field MAE (µg/m3)  *Lab MAE (µg/m3)  Summary
Report
Aeroqual AQY-R Aeroqual
(AQY-R) 		  $5,000 
  PM2.5 
 0.66 to 0.81  0.99   2.9 to 5.1 3.0 to 13.3   PDF
(723 KB) 
aeroqualaqy Aeroqual
(AQY v0.5)
Discontinued
  $3,000
              		 PM2.5  0.84 to 0.87 0.99     28.8 to 36.0  PDF 
(1,178 KB)
 Aeroqual AQY v1.0  Aeroqual
(AQY v1.0) 		  $4,000  PM2.5  0.76 to 0.81  0.99 4.2 to 5.3  5.4 to 15.1  PDF
(674 KB) 
PM10  0.56 to 0.68    35.4 to 38.8     
 Aeroqual S500-PM  Aeroqual
(S500-PM) 		 $1,490  PM2.5  0.46 to 0.67 0.99  4.4 to 6.2    11.9 to 32.4   PDF 
(702 KB) 
PM10  0.15 to 0.24    13.5 to 18.0   
 microaeth AethLabs
(microAeth) 		  $6,500  BC
(Black Carbon) 		 0.79 to 0.94        
Airly  Airly
 $1,000  PM1.0  0.79 to 0.89    4.2 to 5.3     
PM2.5  0.83 to 0.89    4.5 to 5.0   
PM10  0.34 to 0.37    19.3 to 19.7   
Air Quality Egg 2018 Model  Air Quality Egg
(2018 Model)
 		 $249  PM1.0 0.86 to 0.88 0.99  2.1 to 2.3  7.0 to 7.3   PDF
 (771 KB)
PM2.5 0.84 to 0.85 0.99  4.4 to 5.3  6.1 to 6.6 
 PM10 0.12 to 0.13 -  16.4 to 19.2   
 aqev1 Air Quality Egg
(Version 1)  		 $200  PM ~ 0.0        
 aqev2pm Air Quality Egg
(Version 2) 		 $240  PM2.5  
 0.79 to 0.85         
PM10  0.31 to 0.40       
Air Quality Egg 2022 Model Photo Air Quality Egg
 (2022 Model)		  $671 PM1.0  0.84 to 0.89  -  2.9 to 3.9 -   PDF
 (1,039 KB)
PM2.5 0.88 to 0.90  0.99  6.0 to 7.1 5.0 to 8.0 
PM10 0.29 to 0.52  -  18.5 to 20.8  - 
AirThinx IAQ AirThinx
 (IAQ)  		 $1,000  PM1.0 0.68 to 0.70   2.4 to 2.5     
 PM2.5  0.54 to 0.57   4.8 to 5.0   
 PM10  0.03 to 0.05   19.7 to 19.8   
speck  Airviz Inc.
(Speck) 		 $150  PM2.5  0.32         
 alphasenseopcn2 Alphasense
(OPC-N2) 
 $310  PM1.0 0.63 to 0.82 0.99     PDF 
(1,291 KB) 
PM2.5  0.65 to 0.80 0.99    
 PM10   0.45 to 0.57 0.99    
alphasenseopcn2   Alphasense
   (OPC-N3)		 $338  PM1.0  0.78 to 0.82 0.99  4.4 to 5.0  39.0 to 43.2  PDF
 (757 KB) 
PM2.5  0.52 to 0.67 0.99   7.1 to 9.2  
 40.3 to 46.9
PM10  0.45 to 0.52 0.99  18.0 to 24.1  39.2 to 48.0
 Alphasense OPC-R2  Alphasense
(OPC-R2)		 $435   PM1.0 0.77 to 0.87  -  7.8 to 11.8 -   PDF
(1,502 KB)
 PM2.5 0.67 to 0.78  0.98  7.3 to 10.0  41.2 to 45.0 
 PM10 0.69 to 0.86  0.98 to 0.99  7.8 to 15.4  18.5 to 27.9 
APT MINIMA Applied Particle Technology
   (MINIMA)  		 $995  PM1.0  0.84 to 0.89  -  5.0 to 5.6  -   PDF 
(722 KB)
PM2.5  0.86 to 0.89  0.99  5.8 to 6.5  5.0 to 8.1  
PM10  ~0.37  -  39.4 to 40.3  - 
 AQMesh_v5.1  AQMesh
   (v3.0)  		 $7,800  PM1.0  0.55 to 0.73    2.4 to 3.4     
PM2.5  0.47 to 0.79    2.7 to 7.5   
PM10  0.24 to 0.58    11.4 to 23.1   
 AS-LUNG Stationary AS-LUNG
   (Air Quality        Station)   
  $2,000 PM1.0 0.42 to 0.88    3.2 to 7.3      
 PM2.5  0.59 to 0.81    8.0 to 12.1   
PM10 0.15 to 0.23   18.6 to 21.2   
AS-LUNG portable   AS-LUNG
 (Portable) 		  $1,000  PM1.0 0.86  0.99 3.2 to 4.3  2.6 to 3.4 PDF 
(875 KB) 
 PM2.5  0.78 0.99  6.8 to 8.2  12.8 to 13.5 
   PM10 0.11 to 0.14 -  18.9 to 21.6   
Atmotube-Pro 
 Atmotube
 (Pro) 		 $189  PM1.0  0.91 to 0.93  0.99   3.6 to 4.6  
 1.9 to 6.4 PDF
(765 KB) 
PM2.5  0.88  0.99  4.9 to 5.9  2.9 to 3.8 
PM10  0.22  -  20.9 to 22.9  - 
AirSENCE 200x300px   A.U.G. Signals Ltd
 (AirSENCE Standard AS400X)		 $4,000  PM1.0 0.89 to 0.90    3.7 to 4.2    
PM2.5 0.87 to 0.88    3.4 to 3.8  
PM10
 0.28 to 0.29    23.9 to 24.7   

Blues Wireless Airnote 		 Blues Wireless
 (Airnote) 		 $149  PM1.0 0.68 to 0.86    4.3 to 6.8     
 PM2.5  0.67 to 0.75    4.4 to 7.1    
PM10  0.04 to 0.11    20.2 to 34.8    
 cair Cair   $200    PM(1-2) 0.43 to 0.51        
     PM(3-10)  0.39 to 0.51      

 Clarity

 Clarity
(Node)
  $1,300 PM2.5 0.73 to 0.76 0.99  3.0 to 3.4  9.3 to 10.6  PDF
(1,030 KB)
Davis Instruments Airlink Davis Instruments
 (Airlink) 		 $179  PM1.0  0.85 to 0.88   - 2.2 to 2.8  -   PDF 
(837 KB)
PM2.5  0.74 to 0.81  0.99 4.9 to 5.9  4.3 to 6.6  
PM10  0.25 to 0.31  -  12.1 to 26.0  - 
 dylosdc1100 Dylos
 (DC1100 Pro)		 $300  PM(0.5-2.5)  0.65 to 0.85 0.89 4.2    PDF
(1,384 KB) 
 Dylos DC-1700-PM Dylos
 (DC1700-PM)		 $475   PM2.5 0.58 to 0.68 0.95  24.3 to 28.5  198.3 to 209.4  PDF 
(823 KB)
PM10  0.15 to 0.18 -  43.9 to 53.8  - 
 Ecowitt Ecowitt
 (WH415B)  		 $100  PM2.5 0.35 to 0.47    8.2 to 15.4     
EcomSmart Ecomesure
  (EcomSmart)  		 $4,550 PM1.0 0.63 to 0.74
 0.92  5.6 to 7.1  1.6 to 3.7  PDF 
(748 KB)
PM2.5 0.54 to 0.74  0.92  7.0 to 9.6  5.8 to 10.9
PM10  0.08 to 0.25  -  16.7 to 20.3  - 
 Edimax Airbox Edimax
 (AirBox) 		 $249  PM2.5  0.61 to 0.87    4.4 to 5.5     
  Edimax EdiGreen Home   Edimax 
(Edigreen Home)		 $299 PM2.5 0.82 to 0.83   3.3 to 4.4     
 Temtop LKC-1000S+ Elitech 
(Temtop LKC-1000S+) 		 $140  PM2.5  0.91 to 0.92   0.99 3.1 to 3.6  11.1 to 21.9  PDF 
(718 KB) 
PM10  0.31 to 0.35  -  11.7 to 17.9  - 
 Elitech Temtop M2000  Elitech 
(Temtop M2000 2nd Generation)  		 $100  PM2.5  0.77 to 0.82  0.99  2.1 to 3.2  13.3 to 21.5  PDF
(668 KB) 
PM10  0.17 to 0.28  -  12.1 to 14.1  - 
TemtopP20final-1  Elitech 
(Temtop P20) 		 $70   PM2.5 0.42 to 0.87  0.99  3.8 to 6.1 5.1 to 10.7 PDF 
(718 KB) 
Temtop PMD 351  Elitech 
(Temtop PMD 351)		 $960   PM1.0 0.68 to 0.75  -  2.4 to 3.8  -   PDF
(872 KB) 
   PM2.5 0.71 to 0.74  0.99  3.8 to 5.8  26.7 to 28.8  
PM10 0.27 to 0.46   - 9.1 to 18.6  - 
SCK 2.1  FabLab 
(Smart Citizen Kit V2.1)		 $119  PM1.0  0.94  0.99  2.9 to 3.0  11.0 to 11.5 PDF
(731 KB) 
PM2.5  0.76 to 0.77 
 0.99  8.3 to 10.7  11.8 to 14.5  
PM10 0.06 to 0.09 -  48.2 to 56.9  -  
 foobot  Foobot $200 PM2.5  0.55        
 GGsensors TAM GGSensors 
(TAM) 		 $7,999  PM1.0  0.93   5.2 to 5.5    
PM2.5  0.92   5.4 to 5.7  
PM10  0.56 to 0.57    27.4 to 28.0  
 airbeam  HabitatMap  
 (AirBeam) 		 $200  PM2.5  0.65 to 0.70 0.87 15.6 to 29.0  203.5 to 271.9 PDF 
(1,144 KB) 
 AirBeam2 HabitatMap
 (AirBeam2)		 $250  PM1.0  0.99  2.9 to 3.0  16.5 to 18.1  PDF
(854 KB) 
PM2.5  0.63 to 0.75 0.99  3.3 to 3.7  11.3 to 13.5  
PM10  ~ 0.0 -  25.8 to 28.0  -  
Airbeam3 HabitatMap
 (AirBeam3) 		 $249 PM1.0  0.95 to 0.97  0.99 1.3 to 2.6 1.5 to 5.7   PDF
(945 KB)
PM2.5  0.81 to 0.90  0.99  3.6 to 5.3 2.6 to 11.6 
 PM10  0.19 to 0.25  -  20.4 to 26.8 - 
  hanvon1 Hanvon
 (Hanvon N1)		 $200  PM2.5 0.52 to 0.79        

Zaack 200x300 		 Igienair
 (Zaack AQI) 		 $3000   PM1.0 0.78 to 0.83 
- 		 6.3 to 6.5   -  PDF
(818 KB)
 PM2.5 0.80 to 0.82  0.97 3.8 to 4.2  5.3 to 23.0
 PM10  0.69 to 0.71 0.99 14.4 to 23.9  6.0 to 13.1 
 IQAir AVO  IQAir
 (AirVisual Outdoor) 		 $289   PM1.0 0.52 to 0.64    4.5 to 5.6     
 PM2.5 0.54 to 0.65    4.4 to 6.0    
PM10 0.39 to 0.60    10.5 to 14.4   
 iqairvisual IQAir
 (AirVisual Pro) 		 $270 PM2.5  0.69 to 0.73    0.99 4.4 to 4.7  26.8 to 37.0 PDF
(1,461 KB) 
PM10  0.24 to 0.41  -  16.6 to 22.7  -  
 IQAir
 (AirVisual Pro FW1.1683)		 $270  PM2.5 0.63 to 0.81 0.99  3.5 to 5.5  1.8 to 10.8   PDF
(715 KB) 
Kaiterra    Kaiterra
 (Laser Egg 2+)		 $199  PM2.5 0.81 to 0.85  0.99  3.3 to 4.0  15.2 to 23.3  PDF 
(844 KB)  
PM10 0.17 to 0.25  -  8.0 to 17.3  -  
Kunak Kunak   
(Air A10)		 $3000 
 PM1.0 -  0.99  -  10.4 to 17.1   PDF
(746 KB)
 PM2.5 0.69 to 0.75  0.99  5.4 to 6.4  4.3 to 14.4 
PM10  0.60 to 0.68  0.99  18.7 to 21.9  8.9 to 23.5 
Kunak-AIR-Lite Kunak
 (Air Lite) 		 $5033   PM1.0 0.76 to 0.79   2.6 to 3.8     
 PM2.5 0.88 to 0.90   2.1 to 2.8  
PM10 0.61 to 0.62   16.7 to 18.2  
Liveable Cities  Liveable Cities
 (SLX-PM2.5)		 $954  PM2.5
 0.79 to 0.83    6.4 to 9.1     
PM10 0.71 to 0.77    11.9 to 18.1   
Lunar Outpost - Canary-S Lunar Outpost
 (Canary-S)		 $1,070  PM2.5  0.83    3.3 to 3.8     
PM10
 0.14    27.4 to 28.6   

uRadMonitor-A3 		 Magnasci SRL
  (uRADMonitor A3 HW105) 		 $500 PM1.0  0.81 to 0.85    4.0 to 5.2     
PM2.5  0.72 to 0.81    5.2 to 8.9   
PM10  0.15 to 0.38    20.3 to 29.1   
uRadMonitor-INDUSTRIAL  Magnasci SRL
 (uRADMonitor INDUSTRIAL HW103) 		 ~$1,300  PM1.0  0.74 to 0.83    2.7 to 3.7     
PM2.5  0.70 to 0.78    4.1 to 8.1   
PM10  0.13 to 0.34    18.1 to 25.7   
uRADMonitor SMOGGIE  Magnasci SRL
  (uRADMonitor SMOGGIE-PM v1.101) 		 $110  PM1.0  0.84 to 0.86  0.99  4.8 to 5.6  25.3 to 26.8  PDF
(765 KB) 
 PM2.5  0.60 to 0.81  0.99  2.1 to 2.8  19.5 to 22.9 
PM10  0.03 to 0.06  -  17.5 to 25.2  - 
metoneesampler Met One
  (E-Sampler) 		 $5,500  PM1.0  -        
 PM2.5  0.55 to 0.62   10.9 to 15.2   
PM10   -      
 TSP  -      

MetOne ES-405 		  Met One
 (ES-405)		 $5,200   PM1.0   0.84 to 0.91  -  2.8 to 3.6   -  PDF
(837 KB) 
PM2.5  0.80 to 0.92  0.99  3.5 to 4.0   19.0 to 21.2 
PM10  0.78 to 0.92  0.99 4.5 to 8.9  10.4 to 24.4
  metonenm  Met One
 (Neighborhood Monitor)		 $1,900 PM2.5 0.53 to 0.67   6.0 to 8.4     
 airnut Moji China
  (Airnut)  		 $150  PM2.5 0.81 to 0.88        
 Oizom Dustroid Pro V6  Oizom 
  (Dustroid Pro V6)		 $6,000  PM1.0 0.83 to 0.90    1.7 to 3.3    
PM2.5 0.84 to 0.93    2.1 to 4.8  
 PM10 0.59 to 0.75   6.7 to 14.9  
 Oizom Polludrone Smart Oizom 
  (Polludrone Smart) 		 $8,000  PM1.0  0.82 to 0.86   - 4.5 to 5.0 -   PDF
(795 KB)
PM2.5  0.76 to 0.81 0.97  5.4 to 6.1 20.0 to 20.7 
PM10  0.33 to 0.34   - 14.3 to 15.5 - 
 laseregg  Origins 
  (Laser Egg) 		 $200 PM2.5 0.58        
PM10  ~ 0.0      
PAMAir  PAMAir
 (Airmazing PAS-OA-320-3G)		 $500  PM2.5 0.84 to 0.86   3.8 to 4.0    
 perkinelmerelm  Perkin Elmer
 (ELM) 		 $5,200  PM ~ 0.0   20.6 to 30.5     
Piera Systems Canāree R1 Piera Systems
  (Canaree R1)
 $299  PM1.0 0.82 to 0.91 0.99  3.2 to 4.5 4.4 to 11.5 PDF
(775 KB)
PM2.5  0.69 to 0.90 0.99  6.3 to 7.2  31.3 to 44.0
PM10 0.19 to 0.35 -
 16.3 to 22.6 - 
 Plume Labs Flow 2  Plume Labs 
  (Flow 2)		 $199  PM1.0  0.01 to 0.14         
PM2.5  0.01 to 0.13    7.3 to 10.6    
PM10  0 to 0.04    19.3 to 28.3   
iMonPM  PM Monitor
 (iMonPM)		 $1,995  PM1.0   0.77 to 0.89 
  0.98  2.2 to 3.8 1.1 to 2.4   PDF
(756 KB)
PM2.5 0.76 to 0.89  0.98  3.4 to 4.3  2.7 to 4.1 
PM10 0.38 to 0.62  0.99  12.0 to 17.8 8.2 to 9.4 
 purpleair  PurpleAir 
   (PA-I) 		 $150  PM1.0 0.93 to 0.95 0.95     PDF
(1,072 KB) 
PM2.5  0.90 to 0.92 0.99    
PM10  0.32 to 0.44 0.97    
purpleairpa-i-indoor  PurpleAir
(PA-I-Indoor) 		 $180 PM1.0 - 0.99    5.1 to 9.5  PDF 
(772 KB)
PM2.5  0.75 0.99    18.7 to 27.7 
 PM10 0.36 to 0.46 0.97     4.4 to 20.4 
 purpleair-ii  PurpleAir
(PA-II)		 $200  PM1.0  0.96 to 0.98 0.99   11.7 to 15.9  PDF
(1,328 KB) 
PM2.5  0.93 to 0.97 0.99   1.7 to 4.2 
PM10  0.66 to 0.70 0.95   15.6 to 20.5 
 PA2FLEX_resized PurpleAir
(PA-II-FLEX) 		 $299   PM1.0  0.91 to 0.94  0.99  1.4 to 2.2  13.5 to 14.6    PDF 
(822 KB)
PM2.5  0.78 to 0.88  0.99  3.4 to 3.8  1.7 to 2.2 
PM10  0.21 to 0.39  -  15.3 to 24.8  -  
QP Air Monitor Qingping
(Air Monitor)		 $135   PM2.5  0.86 to 0.90   1.8 to 2.3     
QP Air Monitor Lite   Qingping
(Air Monitor Lite)		 $96 PM2.5 0.85 to 0.93    1.8 to 3.6     
 PM10 0.37 to 0.43    16.2 to 20.1   
 QuantAQ 300  QuantAQ
(MODULAIR-PM)		 $1,295   PM1.0 0.87 to 0.94    4.1 to 6.8     
 PM2.5  0.84 to 0.88    4.0 to 5.2    
PM10 0.46 to 0.78   14.7 to 21.6    
Redspira 200x300 Redspira
 		 $180  PM2.5 0.73 to 0.87  0.99  4.7 to 7.1  11.4 to 16.2    PDF
(710 KB)
PM10  0.31 to 0.37  -  30.8 to 33.1  - 
 rtimicropem RTI
 (MicroPEM) 		 $2,000  PM2.5 0.65 to 0.90 0.99 6.4 to 8.3     PDF 
(1,087 KB)
 Sailbri Cooper SCI-resized SailBri Cooper
 (SCI-901)  		 $5,500 PM2.5
 0.79 to 0.89    2.2 to 3.1      
PM10  0.64 to 0.82    5.6 to 14.1    
 sainsmart SainSmart
(Pure Morning P3)		 $170 PM2.5 0.71 to 0.74 0.99 4.8 to 5.4     PDF
(1,186 KB)
 Samyoung Samyoung S&C
(SY-DS-DK3) 		 $100  PM2.5  0.60 to 0.62 0.98  4.8 to 11.4  36.1 to 51.8  PDF 
(841 KB) 
  Sensirion-Nubo   Sensirion
(Nubo)
Discontinued 
 $2,000  PM1.0  0.96  0.99  2.8 to 3.2  1.9 to 4.5   PDF
(795 KB) 
PM2.5   0.91 0.99  4.7 to 5.2  4.9 to 7.6 
Sensirion Nubo Air Sensirion
(Nubo Air) 		 $1,700  PM1.0  0.77 to 0.89    2.9 to 3.5     
PM2.5  0.73 to 0.83    5.2 to 6.5   
Sensirion Sensirion
(SPS30)		 $100 PM1.0  0.91 0.99  1.3 to 1.4  0.8 to 1.4   PDF
(889 KB) 
PM2.5  0.80 to 0.83 0.99  2.0 to 5.1  5.4 to 6.5 
PM10  0.07 to 0.20 -  10.8 to 24.7  - 
 shinyeipmevalkit  Shinyei
(PM Evaluation Kit) 		 $1,000  PM2.5 0.80 to 0.89 0.93     PDF
(1,156 KB) 
StropdeAer - Standard Version   Strop de aer
 $175   PM2.5  0.71 to 0.77  0.99 6.3 to 8.8 29.0 to 32.0  PDF
(811 KB)
 PM10  0.15 to 0.26  -  19.5 to 30.7 - 
Tera Sensor_NextPM Tera Sensor
   (NextPM) 		 $70  PM1.0  0.89 to 0.94  -  2.1 to 4.6 -    PDF
(1,042 KB) 
PM2.5  0.87 to 0.95  0.99  3.9 to 5.6  30.2 to 32.0 
PM10  0.34 to 0.66  0.99 26.2 to 31.6  23.9 to 24.4 
 tsiairassure  TSI
   (AirAssure) 		 $1,500 PM2.5 0.81 to 0.83 0.99   32.4 to 55.0  PDF
(5,647 KB) 
TSI BlueSky  TSI
   (BlueSky) 		  $400  PM2.5  0.65 to 0.76 
 0.99  4.9 to 5.9  3.1 to 6.2  PDF
(715 KB) 
PM10  0.09 to 0.21  -  22.7 to 26.3 - 
uhoo    uHoo   $300 PM2.5 ~ 0.0   9.5 to 17.8     

*The coefficient of determination (R2) is a statistical parameter measuring the degree of relation between two variables. Here, it measures the linear relationship between the sensor and the Federal Reference Method (FRM), or Federal Equivalent Method (FEM), or Best Available Technology (BAT) reference instrument. An R2 approaching the value of 1 reflects a near perfect correlation, whereas a value of 0 indicates a complete lack of correlation. All R2 values reported in these reports are based either on 5-min or 1-hr average data. The Lab R2 values are based on experiments conducted in the chamber, under average ambient conditions (20 degrees C and 40% RH). The mean absolute error (MAE) is a statistical parameter measuring the average of the absolute difference between the sensor and the FRM or FEM or BAT reference instruments, without considering the direction of errors. Higher MAE values indicate higher sensor measurement error when compared to the reference instruments. All field MAE values are based on either 5-min or 1-hr average data; all lab MAE values are based on the experiments conducted in the chamber using a medium PM concentration under ambient conditions (20 degrees C and 40% RH). If a sensor has not demonstrated a good performance in the field, it may not advance to the laboratory chamber test.

Disclaimer

All documents, reports, data, and other information provided on this website are for informational use only. The majority of sensors evaluated as part of the Air Quality-Sensor Performance Evaluation Center (AQ-SPEC) were field-tested inside a custom-made aluminum enclosure to protect the sensors from windblown rain, harsh sunlight, and animals. The field evaluations reports included on this website contain data collected at our monitoring station during a specific 30- to 60-day period and may not be duplicated at the same or different location, season, time period, or weather conditions (e.g. temperature, relative humidity, pressure, wind speed/direction). As the overall sensor performance may be affected by the specific environmental conditions experienced at our location during the time of testing, replication and/or duplication may not possible to achieve. The laboratory evaluation was conducted in the AQ-SPEC’s environmental chamber with simulated pollutant and interferent concentrations that were generated from nebulizer solutions, dust dispensers, and gas dilution calibrators. Generated environments may not be able to fully replicate the conditions that may be experienced under ambient settings. The sensor assembly, installation, and use can also impact the reliability of the products evaluated by AQ-SPEC. South Coast Air Quality Management District (South Coast AQMD) makes no claim, warranty, or guarantee that these devices will or will not work when operated by other users for their specific applications.

South Coast AQMD's AQ-SPEC aims at providing information to and for the benefit of the public to make informed purchasing decisions on commercially available “low cost” air quality sensor devices. In accordance with this mission, the general policy of the Governing Board of the Agency is to exclude from the AQ-SPEC website all commercial advertising and promotional material, including links which provide exclusive private or financial benefit to commercial, non-public enterprises and which do not promote or enhance a public benefit to the general public. As a Government Agency, the South Coast AQMD neither endorses nor supports individual private commercial enterprises through display of their products on the AQ-SPEC website or through providing links to the sites of such commercial enterprises.

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