Update: 2019-11-27 16:34 Source: LUFTMY
Is PM2.5 equivalent to air quality? Many people think that by detecting the PM2.5 value in the air, the air quality can be judged. In fact, the PM2.5 index has only been incorporated into the air quality evaluation system of our country in recent years. The factors affecting the air quality include: CO2, SO2, Co, NOx, TVOC, PM2.5, PM10, ozone, etc. In fact, the IAQ index is often measured by CO2, VOCs, PM2.5, temperature and humidity, which is also the control factor commonly used by purified air conditioning, air purifier and fresh air equipment.
Air purifier with built-in PM2.5 sensor
In recent years, with the continuous deterioration of air quality in China, especially in the northern region, the corresponding air purification products are heating up. As an important part of air purification products, dust sensors (also as dust sensors, particulate matter sensors) are widely used in air fresheners, air purifiers, air conditioners, ventilation equipment, environmental monitoring equipment, etc Products.Dust sensor has not come to the standard configuration of industrial products. In the past two years, both products and technologies have made rapid development. Dust sensor has developed from infrared scattering, passive air intake to infrared scattering, active air intake, from laser scattering self-contained fan, active air intake to laser scattering self-contained fan, active air intake differential calculation, then to laser scattering, air pump active air intake, Products have also formed different levels of low, medium and high-end, facing the terminal needs of different applications.
At present, sensors are more and more used in various fields of social development and human life, such as industrial automation, agricultural modernization, aerospace technology, military engineering, robotics, resource development, ocean exploration, environmental monitoring, security, medical diagnosis, transportation, home appliances, etc. In recent years, the global sensor industry has developed rapidly. In 2017, the market size of particulate matter sensors was US $150 million, which is expected to exceed US $200 million in 2023. The particle sensor market is not as decentralized as the gas sensor market. Four manufacturers occupy most of the market share, so the development space of new manufacturers is limited. With the rapid development of the Internet of things, the domestic sensor industry also ushered in a golden development period.
PM2.5 particles in smoggy weather
PM2.5 sensor is a drop in the ocean in the sensor world, and the affirmation to the industry is not only the price reduction and product popularization of air monitoring products. Take China for example, although it is an indisputable fact that the haze weather is serious and PM2.5 is a threat to human health, most ordinary people haven't paid enough attention to it. One reason is that they don't realize the seriousness of it.
When the shocking numbers can be presented in front of users, the shock and attention will be huge. Previously, it was reported that about 50 "street light sensors" will be deployed experimentally in Chicago to collect various data needed by the public sector. Air sensors only open a small window in the "smart city", while projects like cense are the only way for the smart earth.
The application of smart city
In the future, the world must be covered by sensors. Ubiquitous sensors will collect all kinds of data on the earth, physical, chemical and biological. The world can be quantified and perceived in real time everywhere. People's way of understanding the world has been changed again, just like the Internet and mobile Internet, which brings about great changes in business model again. Perhaps, behind every mobile sensor in the future is an industry of tens of billions.
Laser particle counter module LD15 is a high-precision particle concentration sensor based on laser Mie scattering theory. It 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 air quality sensor LD15 has the characteristics of small volume, high precision, strong anti-interference, low power consumption, long service life, short response time of zero error alarm rate, etc. the PM2.5 particle sensor can be embedded in various instruments or environmental improvement equipment related to the concentration of suspended particles in the air, such as fresh air system, air purifier, etc., to provide timely and accurate concentration data.