refers to the floorboard of the solid and liquid particles floating in the air,
their range of grain diameter is about 0.1-100 microns.
Suspended particulate matter according to the grain diameter size sorting,
respectively, dust particles, fog dust and smoke particles under 10 microns in diameter,
and especially under 2.5 microns in diameter dust and smoke, fog particle diameter is very small,
can be suspended in the air for a long time, was the cause of haze weather, also known as PM2.5.
PM2.5 mainly include organic carbon and elemental carbon, nitrate, sulfate, nitrate,
sulfate by the transformation of nitrogen and sulfur oxides, these gases pollutants are
often human on fossil fuels (coal, oil, etc.) and burning garbage.
PM2.5 particle size is small, the area is large, strong activity, easy with poisonous and harmful substances
(for example, heavy metals, microbiology, etc.), and stay in the atmosphere longer, transmission distance,
thus a great influence on human health and quality of atmospheric environment.PM2.5 monitor,
LanJia handheld particle counter .LanJia decade focus air monitoring and management,
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