One of the biggest challenges with consumer-grade air quality monitors is knowing whether or not they are accurate. The best way to find out about the accuracy of a sensor is to compare it to a standard reference instrument. Unfortunately, in the case of particulate matter (PM1, PM2.5 and PM10), a reference-grade air quality monitor costs tens of thousands of dollars, putting it out of the range of most organisations, individuals, and businesses. This means there are very few organisations or...
