Kyushu Space explains how dust meter works

Dust meter working principle
The dust meter produced by our company is designed based on the principle of light scattering. When the dust-containing air is sucked by the sampling port, it is separated by the cutter, and the dust larger than the cutting particle size is blocked, and the dust smaller than the cutting particle diameter enters the dark chamber of the detector with the airflow, and the floating dust in the dark room generates the scattered light under the light irradiation. The intensity of the scattered light is proportional to the mass concentration of the dust; the detection circuit converts the intensity of the scattered light into a pulse count to obtain the relative mass concentration R of the dust (unit: CPM), which is calculated by the microprocessor of the instrument through a preset mass concentration conversion coefficient K. And shows the dust mass concentration C (unit: mg/m3)

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