An indoor air quality detector is an instrument that can measure indoor air quality. The indoor air quality detector uses a variety of principle sensors to measure a variety of pollutants, including carbon dioxide concentration, particulate matter concentration, volatile organic compounds TVOC, formaldehyde, and other contaminants.
The air quality detector has the following functions.
Master indoor air quality in real-time
Prevent indoor pollution
Find the source of air pollution
Prevent various health problems caused by air pollution
Measuring multiple pollutants: carbon dioxide, particulate matter, TVOC, formaldehyde
]]>How much does a professional multifunctional air quality detector cost? BLATN BR-SMART air quality monitor is currently in special activities, not only discounts but also free shipping, interested friends can learn more. Consult customer service will have further discounts.
]]>Indoor air quality is closely related to people's health. Poor air quality can cause a variety of health problems, so how to measure indoor air quality? How much does indoor air quality testing cost?
To detect indoor air quality, you can choose an indoor air quality detector. A professional air quality detector can measure a variety of pollutants, including particulate matter, PM2.5, carbon dioxide CO2, TVOC, formaldehyde, etc. The detector has a variety of professional sensors, Measure specifically for different air pollutants.
Using an air detector, you can measure almost all common indoor air pollutants. It is essential that because the air quality changes are dynamic, temperature and humidity and airflow conditions will cause air quality to change, so it is beneficial to master air quality in real-time.
The air quality detector is elementary and easy to operate when it is used. Just turn it on, then put it in the room where you want to measure it, Measure and then read it. If the air quality exceeds the standard, the detector will prompt and issue various alarms.
How much does a professional multifunctional air quality detector cost? BLATN BR-SMART air quality monitor is currently in special activities, not only discounts but also free shipping, interested friends can learn more. Consult customer service will have further discounts.
]]>The indoor air quality monitor can be used to measure indoor air. This detector can measure a variety of pollutions and prompt the pollution situation. The advantage of this indoor air quality detector is that it is convenient and straightforward to use, and it has a robust real-time performance. Measure anytime, anywhere. Since air pollution release is a dynamic process, the concentration of pollution varies significantly at different times and under closed conditions. Therefore, using the air quality detector can easily measure indoor air quality.
]]>Indoor air quality is closely related to physical health, so you need to pay attention to the air quality at home. So what is the prevalent pollution in the house? How should it be measured?
Prevalent indoor pollution includes particulate pollution, such as PM0.3, PM2.5, PM10, etc., mainly from dust, oil smoke, and other pollution;
Volatile organic compounds (TVOC), mainly including benzene, toluene, xylene, aldehydes, aromatic hydrocarbons, and other substances, primarily from paints, plates, furniture, etc.
Carbon dioxide CO2 is mainly produced by human respiration. When the carbon dioxide CO2 concentration is too high, it will inhibit the respiratory function and produce symptoms of hypoxia, such as dizziness, chest tightness, and insanity. Or when there is no window to open for a long time during the day.
Formaldehyde HCHO pollution is mainly caused by the volatilization of materials such as plates, new furniture, and floors. Living in an environment with excessive formaldehyde for a long time may cause acute leukemia, primarily affecting children's health. The release period of formaldehyde is generally 3-15 years. If there is new furniture or decoration in the home, you need to choose high-quality furniture or plates as much as possible, and then move in after adequately ventilating.
Pollution generated at home can be effectively diluted through ventilation, or an air purifier can be selected for purification. So how to measure the air quality at home?
The indoor air quality monitor can be used to measure indoor air. This detector can measure a variety of pollutions and prompt the pollution situation. The advantage of this indoor air quality detector is that it is convenient and straightforward to use, and it has a robust real-time performance. Measure anytime, anywhere. Since air pollution release is a dynamic process, the concentration of pollution varies significantly at different times and under closed conditions. Therefore, using the air quality detector can easily measure indoor air quality.
You can also choose a professional indoor air quality testing service provider to do door-to-door air sampling analysis. The advantage of this on-site measurement service is that the measurement results are very accurate and are not easily affected by cross-interference gas. Still, the disadvantage is that it is expensive and cannot be measured in real-time. The air quality may be qualified during the measurement, but the air quality will exceed the standard in a few days.
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The indoor air quality detector uses a variety of principle sensors to measure a variety of pollutants, including carbon dioxide concentration, particulate matter concentration, volatile organic compounds TVOC, formaldehyde, and other pollutants.
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The indoor air quality detector uses a variety of principle sensors to measure a variety of pollutants, including carbon dioxide concentration, particulate matter concentration, volatile organic compounds TVOC, formaldehyde, and other pollutants.
The principle of sensors used to measure different pollutants is also different. Take the indoor air quality detector of BLATN as an example:
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The quality of the indoor air quality detector depends on the performance of the sensors used and the rigor of the factory aging and calibration process. A high-quality sensor tends to be costly and requires at least 72 hours of power-on aging before leaving the factory, as well as multiple debugging and calibration steps.
Therefore, in order to accurately measure indoor air quality, it is necessary to choose a professional and rigorous indoor air quality tester manufacturer.
]]>Air quality is closely related to health. Poor air quality can cause many symptoms, and these symptoms should attract people's attention. So what are the symptoms, possibly caused by poor air quality?
So how to measure indoor air quality? You can choose professional air quality test equipment as a reference to measure CO2, PM2.5, particulate matter, TVOC, formaldehyde, etc. If you find that the indoor air quality is not good, you can open the window to ventilate, or use an air purifier.
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Beijing Wangjing Alibaba Building ventilation system upgrade and renovation, the new fan group installed a purification section at the back end, indoor installation fan coil return air purification section, indoor suspended air purification equipment installed in the ceiling, each floor of the equipment installed automatic control electrical control box.
The air quality automatically matches the purification mode, such as reducing the amount of fresh air when the indoor carbon dioxide concentration is not high and turning on the indoor circulating purifier to achieve energy saving.
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Beijing Xi'erqi Baidu Park has a total of 5 buildings with 130 floors, and ventilation equipment has been installed in the building.
Party A requires the installation of a purification section at the rear of the fan of the ventilation equipment, and a circulating purifier in the ceiling in the building. The purifier adopts the Anhui Binken brand. Because the principle of the purifier is electrostatic dust removal, Party A requires the installation of professional air quality monitoring equipment indoors , Monitor the concentration of particles, carbon dioxide, ozone and other parameters in the building, and install outdoor air quality monitoring equipment outdoors.
The indoor and outdoor air quality data of this floor is displayed on the TV terminal of each floor, and at the same time, it is required to place a 50-inch advertising machine on the first floor lobby of each building to display the air quality in the 130 floor.
The project does not involve the control of air purification equipment. It is a separate air quality monitoring system. It is completed using the BLATN BR-CON air quality monitor and the BLATN air quality information publishing system.
The system can display the air quality in a specific area, and can also publish videos, Pictures, real-time messages, etc.
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A BR-CON air quality monitoring probe is installed at the front desk of the gym, and the data is transmitted to the micro control host through the wired RS485 network, and the micro control host displays the data to the multimedia display through the high-definition line to realize the multi-screen display.
]]>Fresh air purification supporting program
Byte beat office indoor purification project, the project requires the installation of internal circulation purifier indoor, using BLATN BR-K intelligent fresh air controller, using one machine multi-control mode, each fresh air controller controls 4 purification equipment, according to air quality Automatically control the action of the new fan, summarize the data to the cloud platform through wifi, realize the viewing and control of the mobile phone, and connect the TV through the Android computer host to realize the data display.
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school Air quality monitor
1. Overview
In recent years, due to the rapid development of the social economy, the environmental and air pollution problems have become more and more serious. The whole country has been repeatedly affected by smog. When it is serious, the whole city is smog. Strong concern about pollution. Nowadays, environmental pollution, haze weather is becoming more serious, and PM2.5 air quality is seriously exceeding the standard. Controlling the environment and air pollution and protecting the environment have become a major event that the people of the country pay close attention to and must participate in.
2. Project background
No. 8 Zhuyuan West Street, Haidian District, Beijing, Dongbeiwang Central Primary School covers an area of 37.5 acres (25,000 square meters). There are 30 classrooms on the first to fifth floors of the comprehensive building that need to be equipped with an intelligent fresh air control system. Each classroom can automatically adjust the size of the fresh air according to indoor pollutants. The controller can be connected to WIFI to realize the viewing and control functions of mobile phones and WEB terminals.
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The air quality of the office building of China Life Property shows that purification equipment has been installed in the building.
The project requires air quality testing of each floor in the office building. The lobby on the first floor displays air quality data centrally, and uses BLATN ceiling air quality probe according to the requirements of Party A, upload the data to the cloud server through wifi, and customize the display interface according to the requirements of Party A.
]]>outdoor and indoor air quality monitoring system
The air monitoring supporting case of the ventilation system renovation project of the Ministry of Environmental Protection.
The old office building is not equipped with a ventilation system. After an on-site investigation, an office is selected on each floor to be transformed into a new fan room.
Install the electrostatic purification section behind the new fan group, and cooperate with the fan coil return air purification to achieve indoor fresh air volume and air quality requirements. The air quality monitoring program installs an air duct type air quality monitor at the rear end of the purification section for each new fan group, outdoor The outdoor air quality monitoring equipment compares and monitors the purification efficiency of the purification section.
The indoor and outdoor measured particulate matter data is transmitted to the individual touch screen computer local display of each floor via wired RS485 network, and the current purification efficiency is displayed in real time.
The single-floor display system uses the TCP / IP method of the industrial control computer, connects the touch screen with the switch, and reads the data of all air duct sensors (20) through the touch screen. To the centralized display, the system reserves interfaces to connect to the Hailin energy-saving system.
The simple system diagram is as follows:
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Formaldehyde can also come from paints, chemical fiber carpet cleaners, insecticides, disinfectants, preservatives, printing inks, and paper indoor smoking. Formaldehyde has strong adhesion, and can strengthen the hardness and anti-insect and anti-corrosion ability of the board. Therefore, formaldehyde is used as a binder in various particleboard, plywood, large core board, medium density fiberboard and plywood on the market. , will be released in case of heat and deliquescence. Generally, the newly renovated house can have a formaldehyde content exceeding 6 times, and individual cases may exceed 40 times.
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The detection of organic pollutants represents the pollution of organic matter. In 1989, the US Environmental Protection Agency detected more than 900 types.
VOC outdoor mainly comes from fuel combustion and transportation;
The indoors are mainly from combustion products such as coal and natural gas, smoke from smoking, heating and cooking, construction and decorative materials, furniture, household appliances, detergents and the body's own emissions.
Tobacco industry: inks, organic solvents;
Textile industry: glue used in footwear products, etc.;
Toy industry: correction fluid, scented toys, etc.;
Furniture decoration materials: paints, paints, adhesives, etc.;
Auto parts materials: glue, paint, etc.;
Electrical and electronic industry: VOC, electronic hardware cleaning solvents, etc. will be volatilized when used at higher temperatures;
Others: detergents, detergents, fabric softeners, cosmetics, office supplies, wallpapers and other accessories.
The main components of VOC are: hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons and nitrogen hydrocarbons, including: benzene series, organic chlorides, Freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds. Wait. VOC is the abbreviation of volatile organic compounds. The commonly mentioned chemical substances in the wall paint (except heavy metals) refer to VOC. These volatile organic compounds include formaldehyde, ammonia, ethylene glycol, esters and the like. When the VOC reaches a certain concentration in the room, it will cause headache, nausea, vomiting, fatigue and other symptoms. In severe cases, it may even cause convulsions, coma, damage to the liver, kidneys, brain and nervous system, resulting in serious consequences such as memory loss.
Among them, common household decoration is benzene and xylene.
Toluene
Toluene is mainly derived from some solvents, perfumes, detergents, wallpapers, adhesives, paints, etc. The amount of toluene produced by smoking in indoor environments is also considerable.
About 48% of toluene is metabolized in the body after it enters the body. It is finally excreted from the liver, brain, lungs and kidneys. It causes damage to the nervous system. When the concentration of toluene in the blood reaches 1250mg/m3, the short-term memory ability of the contact person, attention Both the durability of the force and the speed of the sensory movement are significantly reduced.
Xylene
Xylene is derived from solvents, insecticides, polyester fibers, tapes, adhesives, wallpapers, paints, wet processing photocopiers, pressboard products, and carpets.
Xylene can be absorbed through the respiratory tract, skin and digestive tract. Its vapor enters the human body through the respiratory tract, and some of it is discharged through the respiratory tract. The absorbed xylene is distributed in the body with the largest amount of adipose tissue and adrenal gland, followed by bone marrow, brain, blood and kidney. And liver. Inhalation of high concentrations of xylene can cause loss of appetite, nausea, vomiting and abdominal pain, sometimes causing reversible damage to the liver and kidney. At the same time, xylene is also an anesthetic. Long-term exposure can cause nervous system dysfunction.
]]>In fact, more and more indoor pollution is also threatening people's lives. So what are the threats to physical health in the invisible air outside and indoors?
First, formaldehyde
Formaldehyde is a colorless, strongly irritating gas that is readily soluble in water, alcohols and ethers. Formaldehyde is gaseous at normal temperature. Formaldehyde is currently recognized as the first indoor killer in the world. Its harm is not temporary or one-time, and the potential danger is countless. In general, the release period of formaldehyde is 3-15 years, in addition to the damage to the healthy adult body, for newborn infants, pregnant and lactating women, growing adolescents, weak constitution, long-term illness The effects of the more, middle-aged and chronically ill patients are more serious.
Due to the continuous expansion of the urbanization process and insufficient supervision, the vast areas of China have become the ubiquitous formaldehyde in the hardest hit areas of formaldehyde. Where is it?
Formaldehyde is abundant in its production process due to its simple production process. Currently in China's fast-growing economic environment, it is widely used in various fields of products. Formaldehyde is used in synthetic resins, surfactants, plastics, rubber, leather, paper, dyes, pharmaceuticals, pesticides, building materials, and disinfection, fumigation, and antiseptic processes. It can be said that formaldehyde is a versatile chemical industry, containing formaldehyde. Therefore, there are a large number of items in daily office and home life, which are in keeping with people. To give a few simple examples, we can easily find the extensive use of formaldehyde.
1, in the production process of each mattress, formaldehyde is widely available in the form of fillers and adhesives:
At present, due to the limited detection capacity, a large amount of fabrics and sponges with excessive formaldehyde are used as a bedding material to fill the mattress, and the formaldehyde exceeds the standard.
It is widely believed that healthy or natural coir or mountain brown mattresses also contain a large amount of formaldehyde. In the process of making mattresses for bedding materials, in order to enhance the strength and hardness of the brown sheets and reduce the cost of raw materials, blindly added a large number of adhesives, causing serious excess of formaldehyde.
In a variety of spring beds, formaldehyde is also present in large quantities. According to the investigation, in the spring mattress products currently on the market, the pad filler is mainly made of urea resin and formaldehyde composite film, and the production standard is not strict and it is easy to cause formaldehyde pollution.
2, formaldehyde is widely used in daily clothing, textile production process, in the form of additives:
A large number of ironing-free shirts are convenient for people's life and work, but anti-wrinkle, anti-shrinkage and flame retardant additives are inseparable from formaldehyde;
Bright and non-fading clothing is not a reflection of high quality. Formaldehyde is a printing, dyeing and durable additive.
Soft clothing or comfortable fabric, formaldehyde is an additive to improve the feel and increase the stiffness of cotton textiles.
In the fabric we are in contact with, formaldehyde not only affects our health through the skin, but also releases free formaldehyde when it comes into contact with the skin. It is absorbed by the body through the respiratory tract and is highly carcinogenic.
3, formaldehyde in the form of adhesives in a variety of sheet furniture:
Formaldehyde, the biggest culprit of indoor carcinogens, is the main component of sheet adhesives. Man-made boards such as large core sheets and high-density boards are widely used, so that formaldehyde is everywhere. Even if the family chooses pure wood furniture, it is inevitably in the office. Other public environments are exposed to large amounts of formaldehyde pollution.
What is even more worrying is that most of the interior of the panel furniture (such as wardrobes, desks, etc.) on the market does not have a cover treatment. The sheet exposes a large amount of formaldehyde and directly contaminates the clothes placed in the clothes. In particular, some cotton pajamas, baby clothing and intimate clothing. The relevant test data shows that the formaldehyde content in the clothes containing the formaldehyde closet greatly exceeds the formaldehyde content of the furniture itself.
4, the floor is the largest indoor air pollution source
In the production process of the floor, in order to ensure the hardness and wear resistance of the floor, it is necessary to use a strong glue containing a large amount of formaldehyde;
In the winter, the indoor space of floor heating is used. When the floor is exposed to high temperature for a long time, the release of formaldehyde and other harmful substances will increase significantly, and the pollution time will be extended to 15-20 years. In addition, the winter indoors are closed and the air flow is poor, which is more harmful to the human body.
5, wallpaper, foam insulation materials, plastic sheets, decorative materials contain a lot of formaldehyde, benzene, etc.
Second, PM2.5
Meteorologists and medical experts generally believe that the haze weather caused by fine particles is far more harmful to human health than sandstorms. Particles with a particle size of 10 microns or more will be blocked from the outside of the human nose; particles with a particle size between 2.5 microns and 10 microns will be less harmful to human health; and fine particles with a particle size below 2.5 microns, diameter Less than 1/20 of the size of human hair, when inhaled into the human body, it will directly enter the bronchi, interfere with the gas exchange in the lungs, and cause diseases including asthma, bronchitis and cardiovascular diseases.
Current research has confirmed that particulate matter will cause three major types of diseases:
1 infectious diseases: including influenza, tuberculosis and pneumonia;
2 Allergies: including asthma and alveolitis caused by natural allergens;
3 lung cancer, etc.
Most of the health effects are thought to be caused by the small particle size fraction of PM2.5 rather than the large particle size fraction. The degree of hazard depends mainly on its composition, concentration and particle size. If the concentration of PM2.5 in the air is higher than 10 μg/m3 for a long time, the risk of death will suddenly increase. For every 10 μg/m3 increase in concentration, the total risk of death increases by 4%, the risk of death from cardiopulmonary diseases increases by 6%, and the risk of death from lung cancer increases by 8% over the same period.
Third, volatile organic compounds (TVOC)
In addition to formaldehyde, another type of air quality that affects indoor air is: volatile organic compounds. It is also the most severe of the three major air pollution. The volatile organic compound means an organic substance having a saturated vapor pressure exceeding 133.32 Pa at room temperature, a boiling point of less than 250 ° C, and a compound which is present in the air at a normal temperature and can be evaporated. Most of these compounds have toxic, irritating, carcinogenic or human-like special odors that affect the skin and mucous membranes and cause damage to the human body.
Invade the immune system and nervous system
Indoors, the concentration of volatile organic compounds on the human body causes imbalances in the body's immune level, affecting central nervous system function, and symptoms such as dizziness, headache, lethargy, weakness, and chest tightness.
Destroy the digestive system and hematopoietic function
TVOC also affects the digestive system, causing loss of appetite and nausea. In severe cases, it can even damage the liver and hematopoietic system, and allergic reactions occur.
Genotoxicity and carcinogenicity, which seriously endanger children's health.
Some volatile organic compounds, such as benzene, vinyl chloride, trichloroethane, trichloroethylene, etc., are genotoxic and carcinogenic. Children are more vulnerable to indoor air pollution than adults. During the growth of children, the amount of breathing is 30% higher than that of adults, and children spend an average of more than 80% of indoor activities. Therefore, TVOC poses a greater threat to children's health.
difficult to govern
The release of VOCs from building materials and furniture increases as the temperature in the room increases, so concentrations of VOCs such as toluene are usually higher during the summer months. In addition, humidity also significantly affects the release rate of VOCs. When the indoor humidity is low, the amount of indoor VOCs released is high. Therefore, TVOC concentration has fluctuations and instability, and it is difficult to eradicate pollution by single detection and treatment, and long-term detection and timely pollution control are required.
In addition to aldehydes in TVOC, toluene, n-butyl acetate, styrene, n-undecane, p-xylene, o-xylene, ethylbenzene and the like are common. The main sources of indoor volatile organic compounds TVOC are:
Organic solvents such as paints, aqueous coatings, adhesives, cosmetics, detergents, quilting, etc.
Building materials such as wood-based panels, foam insulation, plastic sheets, etc.
Interior decoration materials, such as wallpapers, other decorations, etc.
Fiber materials such as carpets, tapestries, and chemical fiber curtains
Office supplies, such as inks, copiers, printers, etc.
Design and use of improper ventilation systems, etc.
Household fuel and cigarettes do not burn completely
Human waste
Industrial waste gas, automobile exhaust, photochemical smog, etc. from outside
]]>Refers to particulate matter in the ambient air with an aerodynamic equivalent diameter of 2.5 microns or less, also known as fine particulate matter. It can be suspended in the air for a long time, and the higher its content (concentration) in the air, the more serious the air pollution.
PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, also known as lung particles. Its diameter is less than 1/20 of the thickness of a human hair. Although PM2.5 is only a small component of the Earth's atmospheric composition, it has an important impact on air quality and visibility. Compared with coarser atmospheric particles, PM2.5 has small particle size, large specific surface area, strong activity, easy to attach toxic and harmful substances (for example, heavy metals, microorganisms, etc.), and has a long residence time in the atmosphere and a long transport distance. Therefore, it has a greater impact on human health and the quality of the atmospheric environment.
Indoors, secondhand smoke is the most important source of particulate matter. The source of the particulate matter is incomplete combustion, so as long as it is a burning tobacco product, it will produce particles with serious harm. The use of better quality cigarettes is only the self-comfort of the smoker.
World Health Organization first identified PM2.5 carcinogenic
2013.10.17, the World Health Organization's International Agency for Research on Cancer released a report that first identified air pollution as a cause of cancer in humans and regarded it as a universal and major environmental carcinogen. However, although air pollution has been proposed as a holistic carcinogen, its damage to the human body may be the result of the simultaneous action of several major contaminants it contains.
Injury organ
Long-term exposure to particles can cause cardiovascular and respiratory diseases as well as lung cancer. When the concentration of PM2.5 in the air is higher than 10 μg/m3 for a long time, there is an increase in the risk of death. For every 10 μg/m3 increase in concentration, the total risk of death increased by 4%, the risk of death from cardiopulmonary disease increased by 6%, and the risk of death from lung cancer increased by 8%. In addition, PM2.5 is highly resistant to organic pollutants such as polycyclic aromatic hydrocarbons and heavy metals, which significantly increase the risk of carcinogenic, teratogenic and mutagenic.
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