‘Laser Egg 2’ produced by the Beijing-based start-up Kaiterra. The reason why I decided to give this one a go was a recommendation by email from Frank Kelly at King’s College London – his colleague had tested a few against the expensive, finely tuned monitors in the lab, and found the Laser Egg 2 matched up rather well. It could fit in my hand luggage, and measures PM2.5 in micrograms (one-millionth of a gram) per cubic metre (mg/m3). During my travels for this book I could turn on my ‘Egg’ wherever I went, as a quick ‘pulse check’ PM2.5mg/m3 reading rather than anything scientifically
...more
Laser egg validation
