Update: 2019-12-30 16:40 Source: LUFTMY
Environmental pollution not only threatens human health and safety, but also restricts the sustainable development of social economy to a great extent.
PM2.5 sensor outdoor environment measurement and control
Environmental monitoring is developed with the generation of environmental pollution, which has a history of more than half a century. In the developed countries, the development of environmental monitoring has generally experienced the stages of typical pollution accident investigation and monitoring, pollution source supervision and environmental quality monitoring.
Outdoor environmental monitoring is to use various technologies to measure and analyze the response or feedback effect of various levels of life system to natural or human action to judge and evaluate the impact, harm and change rule of these interferences on the environment, so as to provide scientific basis for environmental quality assessment, regulation and environmental management.
For example, for a long time, PM10, the inhalable particulate matter, has been known as the air monitoring index earlier, and the air pollutants that are parallel to PM10 include sulfur dioxide, nitrogen oxides, volatile organic compounds, etc. PM2.5 is a new term that has only come into public view in recent years.PM2.5 refers to particles with a diameter of less than or equal to 2.5 microns in the atmosphere, also known as pulmonary particles. Although PM2.5 is only a small component in the earth's atmosphere, it can destroy the energy balance of the earth's surface through the absorption and scattering of solar radiation, affect the earth's climate system, reduce the visibility of the atmosphere and endanger human health. It is an important pollutant affecting the quality of the atmospheric environment.
In recent years, PM2.5 sensor has become a new hotspot in haze detection. This kind of sensor can be measured without any treatment of the sample, but it is easy to be affected by the water molecules, which makes the crystal vibration frequency drift, so it is basically not practical. In order to meet the requirements of outdoor air PM2.5 on-site rapid detection, a lot of PM2.5 rapid measuring instruments have been developed. These instruments can directly measure PM2.5 value on-site, which is convenient for operation and is suitable for outdoor and public air PM2.5 value on-site measurement.
The laser PM2.5 sensor developed by luftmy is a small module that uses light scattering principle to detect dust particles in the air. It can accurately detect specific pm1.0, PM2.5 and PM10 values,UART and PWM output have the advantages of small volume, high detection accuracy, good repeatability, good consistency, continuous acquisition of real-time response, strong anti-interference ability, ultra quiet fan, 100% detection and calibration of sensors, which are suitable for various occasions requiring PM value detection.
Principle of air quality sensor LD07 laser dust concentration sensor module can continuously collect and calculate the number of suspended particles with different particle sizes in the air per unit volume, i.e. particle concentration distribution, and then convert it into mass concentration, and output it in the form of general digital interface. The laser dust concentration sensor module can embed a variety of instruments and meters related to the concentration of suspended particles in the air, such as dust particle counter, dust detector, micro air quality detector or environmental improvement equipment, to provide timely and accurate concentration data.