When I started Smart Air in 2013, I wanted to buy a particle counter, and I had basically two options. I could buy a US$260 Dylos or spend thousands of dollars on the crazy expensive particle counters. Since then, the market has exploded with new particle counters as cheap as 99 RMB. But are they […]
My particle counter is a beast–I’ve loved it. But I’ve always wondered how the counts of laser particle counters like mine: …compare to the measurements of the huge stationary air quality monitoring stations that governments use, like this one in New Zealand: If you look at the US Embassy’s Twitter feed, you’ll notice that its […]
Based on my research into how different filters work, I concluded that a HEPA filter is all you really need to fight particulate air pollution in China. Given the fact fancy air purifiers run for 8,000 RMB here in Beijing, and I’m only here for a year, I thought I’d try making my own. I’ll […]
The beast. The Dylos DC1100 Pro Air Quality Monitor. This is what I use to test whether the filters work. It gives readings of the number of particles 2.5 micrometers and above, as well as .5 micrometers and above per .01 cubic foot. They’re available through Amazon for $261.