Update: 2020-01-13 17:45 Source: LUFTMY
Floating dust is usually called inhalable particles. It is a kind of granular floating matter produced by burning materials. Because of its light particle size, it can float in the atmosphere for a long time. The floating range can reach tens of kilometers, which can cause continuous accumulation in the atmosphere. When it contacts with sulfur dioxide and oxygen in the air, sulfur dioxide will be partially converted into sulfur trioxide, which will increase the acidity of the air and make the pollution process Degree gradually increased. At the same time, flying dust is harmful to health. When the particle size is less than 2.5 μ m, most of them can deposit in the lungs through the respiratory tract, which is more harmful to human body. Let's take a look at the PM2.5 sensor application solution in the dust monitoring.
What about air pollution? Application solution of PM2.5 sensor
Dust pollution is an important aspect of air pollution, and people pay more and more attention to the control of dust pollution. Generally speaking, the main source of small diameter floating dust (PM2.5) is industrial production, automobile exhaust emission and other residues in combustion process. The main source of PM2.5 is man-made emission. Some gaseous pollutants emitted by human body are converted into PM2.5 in the air. The direct emission mainly comes from the combustion process, such as the combustion of coal, gasoline, diesel, burning straw, firewood, burning garbage, etc.
PM2.5 sensor can be used for the detection of dust concentration. PM2.5 sensor is equipped with infrared light-emitting diode and phototransistor. Their optical axes intersect. When the dust air flows through the intersection of optical axes, the floating dust will appear on the infrared light. The reflection intensity of the reflected light is directly proportional to the dust concentration. The infrared light-emitting diode emits light and encounters dust to generate reflected light, receives PM2.5 sensor to detect the intensity of reflected light, outputs signal, determines dust concentration according to the intensity of output signal, and outputs two different pulse width modulation signals (PWM) to distinguish the concentration of different dust particles. Hpd05, the dust particle detection module of LUFTMY PM2.5 sensor, can be applied to the monitoring of air pollution, with the detection particle size range of 0.5-10μm. The modified sensor is applicable to air purifier, intelligent detector and other instruments or environmental improvement equipment, providing timely and accurate concentration data.
Large range infrared dust sensor hpd05 uses the principle of optical scattering to detect the concentration of dust in the air. The product of infrared air sensor hpd05 has the advantages of stable detection ability, high production efficiency and dual advantages. The sensor hpd05 has the characteristics of small volume, high precision, low power consumption, short response time and stable operation under high dust concentration.
LUFTMY focuses on the research, production and sales of optical particle sensor technology. Guided by the corporate culture of "craftsmen build dreams" and adhering to the service tenet of "customer first", LUFTMY has occupied a high market share in the domestic and foreign markets of PM2.5 sensor. Lefmai infrared particle sensor and other sensors are widely praised by the industry in measuring accuracy, stability, consistency error, anti-interference and other performance indicators.