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In one of our previous articles, we built a DIY air quality monitor which was based on measuring the amount of Hydrocarbon concentration in the air using the BME680 VOC Whisker. While things work quite well using that method, there are several other parameters and air constituents which also have the same devastating effect and may be present in the air, but not detected by the sensor used in our previous project. One of such easy to overlook, constituents of air is Particulate Matter, and for today’s tutorial, we will build a device to measure its concentration in air.
Particulate matter is the sum of all solid and liquid particles (many of which are hazardous) suspended in the air. It is a complex mixture of organic and inorganic particles, such as dust, pollen, soot, smoke, and liquid droplets. These particles are created mostly when fuel is burnt and when the dust is carried by the wind. They vary greatly in origin, composition, and size which is the most popular way of categorizing them with the PM10 and PM2.5 classification.
Portable Fine Dust PM10 Analyzer with Large OLED Digits – [Link]
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