sensing the air quality: research on air quality sensors-利来app

sensing the air quality: research on air quality sensors-利来app

share: aqicn.org/sensor/


air quality monitoring is well known and established science which started back in the 80's. at that time, the technology was quite limited, and the solution used to quantify the air pollution complex, cumbersome and really expensive.

patent : monitor and methods for characterizing airborne particulates
fortunately, now days, with the most recent and modern technologies, the solutions used for air quality monitoring are becoming not only more precise, but also faster at measuring. devices are becoming smaller, and cost much more affordable than ever before. for instance, new technologies like the tapered element oscillating micro balance () provide significant advantages over the traditional beta attenuation monitors ()

even more recently, ultra-affordable sensors are starting to appear on the market - many of them linked to the trend of sensing everything. while most of them are purely gimmick, and so definitely useless toys, some of them are starting to achieve performances comparable to professional monitors, at one hundred time less of cost of them. in order to asses the reliability of those sensors, the from the world air quality index project is and has been conducting many air quality sensor research and live-data experiments from many years.

the particle sensors can detect the amount of dust in the air. while the first generation was just able to detect the amount of opacity, most recent sensors can now detect not pm2.5 and pm10 but also up to 7 different particle size (aka bins).
laser based pm2.5/pm10 sensor
20usd (130cn¥)
laser based pm2.5/pm10 sensor
20usd (130cn¥)
laser based pm2.5/pm10 sensor
18usd (120cn¥)
laser based pm2.5/pm10 sensor
14usd (90cn¥)
laser based pm2.5/pm10 sensor
14usd (90cn¥)
comming soon
plantower pms a003
laser based pm2.5/pm10 sensor
24usd (160cn¥)
laser based pm2.5/pm10 sensor
23usd (150cn¥)
comming soon
novafitness sd018
laser based pm2.5/pm10 sensor
19usd (128cn¥)
laser based pm2.5/pm10 sensor
23usd (155cn¥)
laser based pm2.5/pm10 sensor
20usd (130cn¥)
comming soon
sharp dn7c3ja001
virtual impactor for sharp
gp2y1051au0f

20usd (135cn¥)
lpo optical pm sensor
5usd (35cn¥)
lpo optical pm sensor
4usd (24cn¥)
analog optical pm sensor
5usd (35cn¥)
laser based pm2.5/pm10
integrated monitor

300usd (2000cn¥)
comming soon
alphasense opc-n2
laser based pm2.5/pm10 sensor
500usd (3333cn¥)
on the opposite of particle sensors, the gas sensor can detect and count the type of particle present in the air, such as for instance ozone (o3), nitrogen dioxide (no2), sulfur dioxide (so2), ...
ozone electro-chemical sensor
60cny
ozone electro-chemical sensor
57usd (380 cn¥)
ozone mems sensor
18usd (120 cn¥)
no2 mems sensor
23usd (150 cn¥)
no2 electro-chemical sensor
90usd (600 cn¥)
carbon monoxyde electro-chemical sensor
5cny
  • note1: the usd/cny conversion rate is based on 1 cny = 0.15 usd. the price are based on direct purchase from the vendors without shipping cost.

  • note2: the dylos monitor does not really belong to the pm sensor category since it is a completely integrated and standalone monitoring equipment, 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 traceable 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 on the evaluation of low cost chemical sensors for air pollution measurement.

  • note5: if you would like to suggest news sensors, please contact us or just post a message in the discussion board at the bottom of this page.
the graph "bam pm2.5" is the reference measurement from a professional monitor. a 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.






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for the list of all air quality sensors, check the sensor overview page

read or publish comments (they rely on disqus)
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 or the .

for very useful health advices of beijing doctor richard saint cyr md, check 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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