Skip to main content

Using a HandHeld Indoor Monitor Outdoors Means Unreliable Results - 2242 ug for PM 2.5

http://ww2.sinaimg.cn/bmiddle/63115c07jw1eyjy1ol5caj20go0m8758.jpg





 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.

Comments