Sensing the Air Quality
Overview of air quality sensors

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Air Quality sensors experiments on the World Air Quality Index project


In order to asses the realability of Air Quality sensors, the World Air Quality Index project is conducting several live Air Quality Sensor experiments. Click on any of the image below to go to the corresponding experiment with live-realtime data.

Particulate Matter Sensors

Comming Soon
Plantower PMS A003
Laser based PM2.5/PM10 sensor
Cost: 24USD (160CN¥)
Comming Soon
Novafitness SD018
Laser based PM2.5/PM10 sensor
Cost: 19USD (128CN¥)
Comming Soon
Sharp DN7C3JA001
Virtual Impactor for Sharp
GP2Y1051AU0F

Cost: 20USD (135CN¥)
Comming Soon
Alphasense OPC-N2
Laser based PM2.5/PM10 sensor
Cost: 500USD (3333CN¥)

Gas Sensors

Notes

Note1: The USD/CNY convertion rate is based on 1 CNY = 0.15 USD

Note2: The Dylos monitor does not really belong to the sensor category since it is a completely integrated and standalone monitoring equipement, much more expensive than any other sensor, but it is listed here for historical reason.

Note 3: The Alpha Sense OPCN2 is expensive, and the the price you pay is for the tracable calibration (done using Polystyrene Spherical Latex Particles). Otherwise, from a technology side, it does not include anything better than what the $20 sensors can do, except from an IC.

Note4: There are many scientific article on low-cost sensor. See the one from NCAS and WACL for an excellent and brief overview on the evaluation of low cost chemical sensors for air pollution measurement.

Last 5 days PM2.5 comparive measurment

The graph "BAM PM2.5" is the reference measurement from a professional BAM monitor. A loess smoothing is applied to all the other graphs in order to minimize the noise. You can move your mouse over the graph labels to see the actual output vs. the averaged values.



If you have other sensors to suggest, feel free to post a message in the discussion board below and we will check your sensor and the possibility to add it as part of our live experiment.


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For the list of all air quality sensors, check the Sensor Overview page, or just click on any of the link below.

Dylos DC1100 Novafitness SDS011 Plantower PMS1003 Plantower PMS3003 Shinyei PPD42NS Samyoung DSM501 Shinyei (with analog readings)

If you want to join the Sensor Experiment with your own sensor data, just contact us and we will provide you the details to setup your equipment.

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About the Air Quality and Pollution Measurement:

About the Air Quality Levels

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50 Good Air quality is considered satisfactory, and air pollution poses little or no risk None
51 -100 Moderate Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150 Unhealthy for Sensitive Groups Members of sensitive groups may experience health effects. The general public is not likely to be affected. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200 Unhealthy Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300 Very Unhealthy Health warnings of emergency conditions. The entire population is more likely to be affected. Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+ Hazardous Health alert: everyone may experience more serious health effects Everyone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.


Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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