HE-CO10 carbon dioxide sensor has an output value of 430ppm. Is it a reasonable range?

First of all, we have to look at what environment we are testing. Normal values ​​of 350-700PPM are reasonable for workshops and living spaces. If it exceeds 1,000, we need special attention.

What is the general concentration of carbon dioxide indoors and outdoors?

When the carbon dioxide content in the air is normal, it is not harmful to the human body, but when it exceeds a certain level, it will affect people's respiratory system, because the carbonic acid concentration in the blood increases, the acidity increases, and acidosis occurs. So, what level is normal? What is the general concentration of carbon dioxide in indoor and natural environments?

In a natural environment, the normal content of carbon dioxide in the air is 0.04% (400 PPM), sometimes reaching 500 PPM in big cities. When there is no one in the room, the carbon dioxide concentration is generally around 500 to 700 PPM.

Optional reference classification:

A)250~350ppm-usual outdoor air level.

B) 350~1,000ppm - typical value in a well-ventilated living space.

C) 1,000~2,000ppm-the air level is insufficient for oxygen, makes people sleepy, and is enough to cause complaints.

D) 2,000~5,000ppm-stagnant, stale, stuffy air level. It causes headaches, drowsiness, lack of concentration, decreased concentration, rapid heartbeat and mild nausea.

E) > 5,000 ppm-Exposure may cause severe hypoxia, leading to permanent brain damage, coma, or death.

For sensors, 400ppm is the concentration of carbon dioxide in a fresh air environment., When a large number of people gather indoors or in a closed room, the carbon dioxide concentration will gradually increase, leading to hypoxia and other conditions. It is recommended to keep the room airtight or the room with an increased number of people to maintain ventilation to avoid reactions such as stuffiness, irritability, and headaches.

Carbon dioxide concentration standard: How many PPM is harmful to the human body?

The human body is very sensitive to the increase of carbon dioxide in the air. Every 0.5% increase in carbon dioxide content will cause obvious reactions in the human body. If we are in a room with excessive carbon dioxide for a short period of time, carbon dioxide will have the following effects on our bodies:

When the concentration of carbon dioxide reaches 1% (1000 PPM), people will feel dull, lose concentration, and have palpitations. If carbon dioxide reaches 1,000 PPM in an airtight bedroom and we sleep for 8 hours straight, we will feel unrested and not want to get up when we get up in the morning. If the CO2 content in the office air reaches 1000PPM, employees' work efficiency will decrease.

When the carbon dioxide concentration reaches 1500-2000 PPM, people will feel asthma, headache, and dizziness. When two people sleep in a closed bedroom for one night, the concentration of carbon dioxide can easily reach 2,000 PPM. When the concentration of CO2 in the office air reaches 2,000 PPM, employees will feel sleepy, inattentive, and mentally fatigued. After exceeding 2000PPM, we don't even want to continue working, and our thinking ability drops significantly.

When the level exceeds 5000PPM, the human body's functions will be severely disrupted, causing people to lose consciousness and become confused.

What are the long-term effects of excessive carbon dioxide concentration on the human body?

It can be seen from this that carbon dioxide is very harmful to the human body, and some people's indoor carbon dioxide concentration will definitely increase. In order to be aware of the harm of carbon dioxide to the human body, you can put a quilt on your head before going to bed at night: but we will definitely feel uncomfortable for a minute. The biggest reason for this uncomfortable feeling is not because there is less oxygen, but because the carbon dioxide concentration has reached dangerous levels.

Excessive carbon dioxide concentration in the short term will not have much impact on our bodies. But if we live and work in an environment with too high carbon dioxide for a long time, it will cause great harm to the human body. Carbon dioxide is denser than air. When there is less carbon dioxide, it is not harmful to the human body. However, when it exceeds a certain amount, it will affect the breathing of humans (and other organisms). The reason is that the carbonic acid concentration in the blood increases, the acidity increases, and acidosis occurs.

Many employees stay in airtight offices for long periods of time; after returning home, we have to stay in airtight rooms because outdoor pollution and noise prevent us from opening windows for ventilation.

In the cold winter, we close the doors and windows to form a closed environment to block the entry of cold outdoor air. As we take a breath of oxygen in the air and exhale a breath of carbon dioxide produced in the body, the oxygen in the room is not replenished, and the concentration of carbon dioxide becomes higher and higher. We don't want to open the windows for ventilation at this time, because once the windows are opened, cold air, haze and outdoor noise will enter the room. In the summer, we often turn on the air conditioner and are unwilling to open windows for ventilation. Although the indoor air becomes cooler, there is no fresh air coming in, and the concentration of carbon dioxide continues to rise. As a result, many people have been in a state of hypoxia at home and in the office, which is very harmful to the body over time.

Children are most vulnerable to the harm of carbon dioxide: their bodies are relatively fragile, and because carbon dioxide is 1.5 times heavier than air, the concentration of CO2 will be higher the closer to the ground. Pregnant women are also at risk from carbon dioxide because they also stay at home for long periods of time.

In order to solve the problem of indoor pollution, many people place air purifiers at home. Although it can effectively filter dust, allergens, PM2.5, and even some odors, the purifier cannot reduce the concentration of carbon dioxide. On the contrary, the indoor carbon dioxide will increase because when we turn on the air purifier, all the windows in the home will be closed.