In a recent article in Weibo, the person monitored the outdoor air in Beijing and got a reading of 2242 ug for PM 2.5 which was posted in a blog. The official monitors registered more than 1/2 lower reading for PM2.5 at the same time. This is the prime example of why using a handheld monitor to measure ambient air will not offer reliable data.
In a recent article in Weibo, the person monitored the outdoor air in Beijing and got a reading of 2242 ug for PM 2.5 which was posted in a blog. The official monitors registered more than 1/2 lower reading for PM2.5 at the same time. This is the prime example of why using a handheld monitor to measure ambient air will not offer reliable data.
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