The SDS021 Air Quality Sensor experiment

Share: aqicn.org/sensor/sds021/cn/
For a complete list of all the Air Quality Sensors test on aqicn.org, check our sensor overview page.



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The SDS 021 Sensor

The SDS 021 Sensor is the latest update from inovafitness on their SDS Air Quality sensor range (the first one in the SDS011. There is also an intermediate one called SDS018 which we did not review).

Experiment Setup

2 SDS 021 sensors are collocated. The objective is to understand the accuracy of individual sensor readings, and potential level of error induced by the lack of efficient calibration of low-cost sensors .

Sensor tear-down

To be udpated later

Spec sheet: SDS021 传感器

Real-time data

Time series for Particulate Matter

Note that the time-series graphs are showing the values using AQI (and not raw mg/m3). The AQI is based on the US EPA breakpoints. For PM1, the PM2.5 breakpoints are used.

Time series for Meteorological Conditions

Meteorological conditions, and especially the Relative Humidity (RH) is needed as high RH might have a direct impact on the size of the particle size detected by the laser. For BAM sensors, there is actually a requirement for constant humidity.




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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)

关于空气质量与空气污染指数

本网站采用的污染指数和颜色与EPA是完全相同的。 EPA的指数可以从 AirNow上查到

空气质量指数 空气质量指数级别(状况)及表示颜色 对健康影响情况 建议采取的措施
0 - 50 一级(优) 空气质量令人满意,基本无空气污染 各类人群可正常活动
51 -100 二级(良) 空气质量可接受,但某些污染物可能对极少数异常敏感人群健康有较弱影响 极少数异常敏感人群应减少户外活动
101-150 三级(轻度污染) 易感人群症状有轻度加剧,健康人群出现刺激症状 儿童、老年人及心脏病、呼吸系统疾病患者应减少长时间、高强度的户外锻炼
151-200 四级(中度污染) 进一步加剧易感人群症状,可能对健康人群心脏、呼吸系统有影响 儿童、老年人及心脏病、呼吸系统疾病患者避免长时间、高强度的户外锻炼,一般人群适量减少户外运动
201-300 五级(重度污染) 心脏病和肺病患者症状显著加剧,运动耐受力降低,健康人群普遍出现症状 儿童、老年人及心脏病、肺病患者应停留在室内,停止户外运动,一般人群减少户外运动
300+ 六级(严重污染) 健康人群运动耐受力降低,有明显强烈症状,提前出现某些疾病 儿童、老年人和病人应停留在室内,避免体力消耗,一般人群避免户外活动
(参考详见 http://zh.wikipedia.org/wiki/空气质量指数)

如果你想了解更多有关空气质量与污染,详见维基百科或者 AirNow

有关健康建议详见北京的Richard Saint Cyr MD医生的博客:www.myhealthbeijing.com


注意事项: 所有空气质量数据在发布时均未经验证,并且为了保证数据质量,这些数据可能随时被修改,恕不另行通知。 世界空气质量指数项目在编制此信息的内容时已经运用了所有合理的技能和谨慎,在任何情况下世界空气质量指数项目团队或其代理人将不会为由于提供此数据而直接或间接引起的伤害、合同损失、侵权及其他任何损失负责。



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