Sensing the Air Quality: Research on Air Quality Sensors
Overview of Air Quality sensors experiments

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Air quality monitoring device & sensors research


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 US7947503: 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 (TOEM) provide significant advantages over the traditional Beta Attenuation Monitors (BAM)

Even more recently, ultra-affordable sensors are starting to appear on the market - many of them linked to the IOT 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 Earth Sensing Labs from the World Air Quality Index project is and has been conducting many Air Quality Sensor research and live-data experiments from many years.

Particle Sensors

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).
Plantower PMS 7003
Laser based PM2.5/PM10 sensor
20USD (130CN¥)
Plantower PMS 5003
Laser based PM2.5/PM10 sensor
18USD (120CN¥)
Plantower PMS 3003
Laser based PM2.5/PM10 sensor
14USD (90CN¥)
Plantower PMS 1003
Laser based PM2.5/PM10 sensor
14USD (90CN¥)
Comming Soon
Plantower PMS A003
Laser based PM2.5/PM10 sensor
24USD (160CN¥)
Novafitness SD011
Laser based PM2.5/PM10 sensor
23USD (150CN¥)
Comming Soon
Novafitness SD018
Laser based PM2.5/PM10 sensor
19USD (128CN¥)
Novafitness SD021
Laser based PM2.5/PM10 sensor
23USD (155CN¥)
Yuntong YT-001
Laser based PM2.5/PM10 sensor
20USD (130CN¥)
Comming Soon
Sharp DN7C3JA001
Virtual Impactor for Sharp
GP2Y1051AU0F

20USD (135CN¥)
Shinyei PPD42NS
LPO Optical PM sensor
5USD (35CN¥)
Samyoung DSM501
LPO Optical PM sensor
4USD (24CN¥)
Modified Shinyei PPD42NS
Analog Optical PM sensor
5USD (35CN¥)
Dylos DC1100
Laser based PM2.5/PM10
integrated monitor

300USD (2000CN¥)
Comming Soon
Alphasense OPC-N2
Laser based PM2.5/PM10 sensor
500USD (3333CN¥)

Gas Sensors

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), ...
MQ 131
Ozone Electro-Chemical sensor
60CNY
Specs
Ozone Electro-Chemical sensor
57USD (380 CN¥)
SGX MiCs 2614
Ozone MEMS sensor
18USD (120 CN¥)
SGX MiCs 2714
NO2 MEMS sensor
23USD (150 CN¥)
Alphasense NO2 B43F
NO2 Electro-Chemical sensor
90USD (600 CN¥)
MQ 9
Carbon Monoxyde Electro-Chemical sensor
5CNY

Notes

  • 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 overview 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.

Last 5 days PM2.5 comparative measurement

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.






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

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空気の質と大気汚染指数で

大気品質レベルについて

指数 大気質指数の分類(米国) 健康影響 / カテゴリ 粒子状物質(PM10,PM2.5)
0 - 50 良い - Good 通常の活動が可能 なし
51 -100 並 - Moderate 特に敏感な者は、長時間又は激しい屋外活動の減少を検討 非常に敏感な人は、長時間または激しい活動を減らすよう検討する必要がある。
101-150 敏感なグループにとっては健康に良くない - Unhealthy for Sensitive Groups 心臓・肺疾患患者、高齢者及び子供は、長時間又は激しい屋外活動を減少 心疾患や肺疾患を持つ人、高齢者、子供は、長時間または激しい活動を減らす必要がある。
151-200 健康に良くない - Unhealthy 上記の者は、長時間又は激しい屋外活動を中止
すべての者は、長時間又は激しい屋外活動を減少
心疾患や肺疾患を持つ人、高齢者、子供は、長時間または激しい活動を中止する必要がある。それ以外の人でも、長時間または激しい活動を減らす必要がある。
201-300 極めて健康に良くない - Very Unhealthy 上記の者は、すべての屋外活動を中止
すべての者は、長時間又は激しい屋外活動を中止
心疾患や肺疾患を持つ人、高齢者、子供は、全ての屋外活動を中止する必要がある。それ以外の人でも、長時間または激しい活動を中止する必要がある。
300+ 危険 - Hazardous 上記の者は、屋内に留まり、体力消耗を避ける
すべての者は、屋外活動を中止
全ての人が屋外活動を中止する必要がある。特に、心疾患や肺疾患を持つ人、高齢者、子供は、屋内に留まって激しい活動を避け静かに過ごす必要がある。
(Reference: see wikipedia, and cn.emb-japan.go.jp/)

あなたは空気の質や汚染についての詳細をお知りになりたい場合は、WikipediaAirNowを参照してください。

北京の医者Richard Saint Cyrの非常に便利な健康アドバイスについては、 www.myhealthbeijing.com をチェックしてください。


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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Temperature unit:
Celcius