Ozone is a non-toxic and safe gas. When the concentration is higher than 1.5ppm, ozone stimulates the human respiratory system,

Ozone Association to develop safety and health standards:(1ppm = 1 mg/m3)

International Ozone Association: 0.1ppm, 10 hours of exposure

USA: 0.1ppm, 8 hours of exposure

Germany, France, Japan and other countries: 0.1ppm, contact for 10 hours

China: 0.15ppm, 8 hours of exposure

National Ministry of Health regulations on safe ozone concentrations
Shenzhen Dongri Yingneng Technology Co., Ltd. Ozone Gas Detector

The product of its concentration and contact time can be regarded as the reference point.

When the concentration of ozone is 0.02ppm, people with agile sense of smell can detect it, which is called sensory critical value. When the concentration is 0.15ppm, it is olfactory critical value, which can be sniffed by ordinary people and is also a health standard point. When the concentration reaches 1-10ppm, it is called the stimulation range, and more than 10ppm is the poisoning value.

National Ministry of Health regulations on safe ozone concentrations
Shenzhen Dongri Yingneng Technology Co., Ltd. Gas Detector

People's perceived concentration of ozone is only 0.02~0.04ppm, and there is a certain interval between the safe concentration. In the indoor use of ozone to purify the air, smell the ozone smell has basically reached the role of disinfection. At about 0.02ppm, the air will feel particularly fresh. The refreshing feeling in the air after a thunderstorm is due to the large amount of ozone and negative ions produced by lightning. Some scientists have concluded that if there is no ozone in nature, humans will suffer a lot of additional disasters, so the evaluation of ozone is a "god-given purifier". Since the "discovery" of ozone, there has been no death from ozone poisoning in the world.

The safe concentration of ozone stipulated by the Ministry of Health is 0.1ppm, the industrial health standard is 0.15ppm, and the labor protection department stipulates that no more than 10 hours of work is allowed under the safe concentration. However, the ozone concentration that people can smell is generally 0.02ppm, which is far from the safe concentration. Due to the strong irritation of ozone, people have already avoided it when they feel unwell, so poisoning generally does not occur during use.

National Ministry of Health regulations on safe ozone concentrations
Shenzhen Dongri Yingneng Technology Co., Ltd. Gas Detector

Ozone is an unstable gas, its half-life is only about thirty minutes, do not need to deliberately eliminate it, at room temperature, it will exist at most about thirty minutes, after the reduction to oxygen, if you have to eliminate it, there are several points, one is to let the air flow, dilute the ozone concentration, and finally achieve elimination. The second is heating, when the temperature reaches about 60 degrees Celsius, ozone will be quickly reduced to oxygen. Third, the use of strong oxidizing ozone, the release of other substances that are prone to oxidation reactions, and ozone. (more trouble, high cost, not worth promoting). Ozone gas taste, grass flavor. The human perceived concentration of ozone is 0.02-0.04PPM, while the US standard indicates that when the ozone concentration is 0.1PPM safe concentration, continuous direct contact is allowed for 10 hours.