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PM2.5 sensors usually adopt the principle of laser scattering to detect particulate matter in the air. There is a laser light source inside. When the air sample is sucked into the sensor, the laser irradiation on the particulate matter will produce scattered light. The intensity of the scattered light is related to the quantity and size of the particulate matter. By detecting and analyzing scattered light, the sensor can calculate the concentration of PM2.5 particles in a unit volume of air.
The PM2.5 sensor in the integrated intelligent module of solar street lamps has multiple competitive aspects in the field of environmental monitoring, mainly reflected in the following aspects: