The Dylos Air Quality Sensor experiment

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Introduction

For more information about those real-time dylos and BAM monitor PM2.5 and PM10 readings, please refer to our article on the Dylos Air Particule Counter experimentation.

If you want to know about other affordarable Air Quality Sensors such as Shinyei and Samyoung, check our sensor overview page.

Real-time data

Current dylos readings are: Particules larger than 0.5 is -, larger than 2.5 is -, updated on - - (China time).

Those values are expressed in number of particules per 0.01 cubic foot (100.n/ft3), i.e. same as what is displayed on the Dylos LCD.

Time series graphs

The following two graphs show the last 30 days data correlation for the Beijng Sanlitun Dylos monitor (in blue) and Beijing Chaoyang Agricultural Exhibition Hall (朝阳农展馆) BAM monitor (in red).

Note that the comparison between Dylos and BAM readings is done for Dylos ≥ 0.5u with PM2.5 and Dylos ≥ 2.5u with PM10. You might think that comparing readings for Dylos ≥ 2.5u and PM2.5 might be more relevant, but this is actually not the case. The explanation is given in the experiment ' what is the dylos monitor actually measuring'.



Variation between stations

The next 2 graphics show the PM2.5 and PM10 raw values (in µg/m3) for different BAM stations (i.e. without the Dylos values) in Beijing, for the last 10 days. This is provided to ensure that there is not significant devitation between the various stations, especially considering that some are located on the road side, while others are in the living area.

CAC Chaoyang Agritculture Center (朝阳农展馆), BAM PM.25 in µg/m3
COSC Chaoyang Olympic Sports Center (朝阳奥体中心), BAM PM2.5 in µg/m3
DCDS Dongcheng Dongsi (东城东四), BAM PM2.5 in µg/m3
US Emb US Embassy (美国大使馆), BAM PM2.5 in µg/m3



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For the list of all air quality sensors, check the Sensor Overview page

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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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