Fine particulates by Embassy US in Hanoi


This station is using MetOne equipment with Beta Attenuation Method (BAM) which yields a hourly output equipvalent to PM2.5 concentration by comparing the attentuation (decrement) of the intensity of beta ray after one hour of filtering and of the blank filter. The AQI indexes are calculated directly from hourly PM2.5 concentration by the equation provided by US. EPA and by VN. VEA.