Air Quality Sensor Performance Evaluation Center
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Summary Tables & Reports

   

Gaseous Sensors

Sensor 
Image 
Make
(Model)
Est. Cost(USD)  Type Meas. *Field R2 *Lab
R2
Summary Report
  2bpom  2B Technologies
(POM)
$4,500 UV absorption
(FEM Method)
 O3  1.00 0.99 PDF
(1,295 KB)
aeroqualaqy Aeroqual
(AQY)
Ver. 0.5
 $3,000 Electrochem NO2 0.77    
Metal Oxide O3 0.95  
 aeroqual Aeroqual
(S-500)
 $500 Metal Oxide O3 0.85 0.99 PDF
(1,197 KB)
 aqev1cono2o3 Air Quality Egg
Ver. 1
 $200 Metal Oxide CO 0.0    
NO2 0.40  
O3 0.85  
 aqev2cono2 Air Quality Egg
Ver. 2
 $240 Electrochem CO 0.0    
NO2 0.0  
  AQE  Air Quality Egg
Ver. 2
 $240 Electrochem O3  0.0 to 0.20    
SO2 n/a  
 aqmeshv3 AQMesh
Ver. 4.0 Discontinued
$10,000 Electrochem CO 0.42 to 0.80    
NO 0.0 to 0.44  
NO2 0.0 to 0.46  
O3 0.46 to 0.83  
 perkinelmerelm Perkin Elmer
(ELM)
$5,200 Metal Oxide NO n/a    
NO2 0.0  
O3 0.89 to 0.96  
 smartcitizenkit  Smart Citizen Kit $200 Metal Oxide CO 0.50 to 0.85    
NO2 0.0  
 specsensors   Spec Sensors $500 Electrochem CO 0.84 to 0.90    
NO2 0.0 to 0.16  
O3 0.0 to 0.24  
 uhoo uHoo $300 Metal Oxide CO 0.0     
O3 0.43 to 0.72  
 sensit UNITEC
(SENS-IT)
$2,200 Metal Oxide CO 0.33 to 0.43 0.99 PDF
(1,283 KB)
NO2 0.60 to 0.65  
O3 0.72 to 0.83 0.82 to 0.90 PDF
(1,177 KB)
   vaisalaaqt410  Vaisala
(AQT410)
Ver. 1.11
$3,700 Electrochem CO 0.28 to 0.31    
NO2 0.0  
O3 0.40 to 0.58  
SO2 n/a  
vaisalaaqt410 Vaisala
(AQT410)
Ver. 1.15
$3,700 Electrochem CO 0.80 to 0.83    
NO2 0.43 to 0.61  
O3 0.66 to 0.82  
SO2 n/a  
*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 evaluations 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). If a sensor has not demonstrated a good performance in the field, it may not advance to the laboratory chamber test. An ad-hoc rating system will be developed to summarize the overall performance of these sensors.

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) program 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 the AQ-SPEC program. South Coast Air Quality Management District (SCAQMD) makes no claim, warranty, or guarantee that these devices will or will not work when operated by other users for their specific applications.

The South Coast AQMD AQ-SPEC program in the Quality Assurance division of the Science and Technology Advancement office 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 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 SCAQMD 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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