BGT-PM2512 Detecting the concentration of particulate matter with diameter less than 2.5 microns and less than 10 microns in the air. The principle of laser scattering is adopted, that is, the laser is irradiated on the suspended particulate matter in the air to generate scattering, and the scattered light is received by the detector at a certain angle, and the generated photocurrent is amplified to obtain a corresponding curve of the electrical signal and the particulate matter. After data collection by microprocessor, the particle mass with different particle size per unit volume is obtained through a series of algorithms. This product is an industrial standard output (RS485) PM monitor, mainly used in environmental protection, scenic areas, parks and other fields. It detects changes in dust concentration trends, enables long-distance transmission, and can be connected to various standard secondary instruments. Monitors air temperature and humidity.