According to People's Daily, at 13:00 on July 21, Nanjing, Jiangsu Province, held a press conference to inform the prevention and control of the new crown pneumonia epidemic at Lukou International Airport. As of press time, a total of 17 cases of nucleic acid test positive patients were found, including 9 confirmed cases, 5 cases of asymptomatic infected, and another 3 cases to be further diagnosed; the city is ready to take the next step to do a good job of testing all the city's nucleic acid in the shortest possible time.
Under the environment of global epidemic normalization, our country always maintains high alertness and high efficiency in epidemic prevention to cope with the epidemic that may come at any time. At the same time, most overseas countries and regions do not dare to relax, pay attention to air environmental health during the epidemic, have introduced a variety of restrictions on the gathering of people, to ensure that all kinds of places in the air circulation of the epidemic prevention program, which is the most special is the Belgian air quality monitoring requirements, the program fully embodies the local "monitoring of carbon dioxide" obsession! The program fully reflects the local obsession with "monitoring carbon dioxide".
According to the Huashang Times compiled a comprehensive report, the Belgian Consultative Council meeting introduced the relaxation of anti-epidemic measures required: all business restaurants, cafes will have to be equipped with "air quality measurement equipment" (i.e., measuring the concentration of carbon dioxide equipment), and installed in the location of the customer can be seen, the results of the monitoring shall not be higher than 1,200 ppm, or else to be Otherwise, they will have to close down.
Why do we need to monitor indoor carbon dioxide levels?
It turns out that when a large number of people gather indoors, the CO2 produced by human respiration into the air, will quickly increase the indoor CO2 concentration, the requirement for restaurants and cafes to be equipped with equipment that can measure the concentration of carbon dioxide, which allows customers to intuitively understand whether the air inside the store is circulating, whether the flow of people is in the reasonable scope of the epidemic prevention requirements, is a scientific way to supervise the implementation of the business tenants to ventilate the air, limiting the initiative of the scientific approach.
The high concentration of carbon dioxide does not only indicate the risk of viral infections in poor air circulation, but can also directly harm people's health. The human body inhales excessive carbon dioxide, will be associated with the respiratory system is damaged; excessive carbon dioxide into the blood, will make the blood carbonate concentration increases, acidic enhancement, serious acidosis will occur. From this level, monitoring indoor carbon dioxide concentration is a necessary step to protect people's health.
How high is the indoor carbon dioxide level harmful to health?
Under unoccupied circumstances, indoor carbon dioxide concentration is generally maintained within the range of 500~700 PPM (i.e. 0.05%~0.07%). When more people gather indoors and the carbon dioxide concentration rises to 1,000 PPM (i.e. 0.1%), people will begin to show dreariness, inattention, palpitations and other undesirable states, and then the air carbon dioxide content increases by every 500 PPM (i.e. 0.5%), the human body will experience more serious physical discomfort.
In order to improve the effectiveness of indoor air quality detection and prevent people from physical problems caused by the high concentration of carbon dioxide in the air, AUDIOWELL has independently developed a carbon dioxide sensor to provide people with real-time carbon dioxide detection results, and to be alert to the hazards of high concentration of carbon dioxide indoors. The small size of the product is conducive to simplifying the internal design structure and reducing the size of electrical appliances, which is widely used in fresh air systems, air purifiers, air detectors and other electrical equipment.
Product Features
- High measurement accuracy
- Wide measurement range
This carbon dioxide sensor is based on the principle of non-spectroscopic infrared absorption, the working principle is to determine the intensity and wavelength of infrared light irradiated into the air, absorbed by the carbon dioxide in the air, the receiver tube through the detection of the intensity of the absorbed infrared light to output the corresponding electrical signal. The receiver tube detects the intensity of the absorbed infrared light and outputs the corresponding electrical signal. The sensor internally filters and amplifies the electrical signal, and the mcu calculates the concentration of carbon dioxide in the air through an algorithm, and then outputs analog signals in the form of PWM and digital signals in the form of UART serial interface.
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