Environmental pollution not only threatens human health and safety but also largely constrains the sustainable development of the social economy. The importance of strengthening environmental protection is self-evident.

Environmental monitoring has developed alongside the emergence of environmental pollution and has a history of more than half a century. In industrially developed countries, environmental monitoring has generally gone through stages focused on typical pollution incident investigation, source monitoring for supervision, and environmental quality monitoring.

Outdoor environmental monitoring utilizes various technologies to determine and analyze the comprehensive characterization of the responses or feedback effects of living systems at various levels to natural or man-made actions. This is done to judge and evaluate the impact, hazards, and patterns of change that these disturbances produce on the environment, providing a scientific basis for environmental quality assessment, regulation, and management.

For example: for a long time, inhalable particulate matter, namely PM10, was known earlier as an atmospheric monitoring indicator, while other atmospheric pollutants listed alongside it include sulfur dioxide, nitrogen oxides, and volatile organic compounds. PM2.5 is a new term that has only entered the public view in recent years. PM2.5 refers to particulate matter in the atmosphere with a diameter less than or equal to 2.5 micrometers, also known as lung-penetrating particles. Although PM2.5 is only a very small component of the Earth's atmospheric composition, it can disrupt the surface energy balance through the absorption and scattering of solar radiation, affecting the Earth's climate system, reducing atmospheric visibility, and endangering human health. It is an important pollutant affecting atmospheric environmental quality.

In recent years, the measurement of PM2.5 by PM2.5 sensors has become a new hotspot in haze detection research. In fact, piezoelectric PM2.5 sensors appeared as early as 1983. These sensors can perform measurements without any sample treatment, but they are easily affected by water molecules, causing the crystal vibration frequency to drift, so they have basically no practical utility. To meet the requirements of rapid on-site detection of outdoor PM2.5, many PM2.5 rapid detectors have been developed. These instruments can directly determine PM2.5 values on-site, are easy to operate, and are suitable for on-site measurement of PM2.5 values in outdoor and public places.

The laser-type PM2.5 sensor developed by LUFTMY is a small module that uses the light scattering principle to detect dust particles in the air. It can accurately detect specific values of PM1.0, PM2.5, and PM10 with UART and PWM outputs. It features a small size, high detection accuracy, good repeatability, good consistency, real-time response with continuous sampling, strong anti-interference capability, and uses an ultra-quiet fan. Each sensor is 100% tested and calibrated before leaving the factory, making it suitable for various occasions requiring PM value detection.

The LUFTMY air quality sensor principle laser dust concentration sensor module LD07 is a high-precision particulate concentration sensor based on Laser Mie Scattering theory. It can continuously collect and calculate the number of suspended particles of different sizes in the air per unit volume (i.e., particle concentration distribution), and then convert them into mass concentration and output them via a universal digital interface. This laser dust concentration sensor module can be embedded in various instruments or environmental improvement equipment related to suspended particulate concentrations, such as dust particle counters, dust detectors, and miniature air quality detectors, providing timely and accurate concentration data.