臭氧浓度在0.02ppm时，嗅觉敏捷的人便可觉察，称为感觉临界值，浓度

When the ozone concentration is 0.02ppm, people with quick sense of smell can detect it, which is called the sensory threshold. When the concentration is 0.15ppm, it is the olfactory threshold, which can be smelled by most people, and it is also a health standard point. When the concentration reaches 1-10ppm, it is called the irritation range, and when the concentration is above 10ppm, it is the poisoning value.

Ozone concentration at 0.02 ppm, the olfactory agile person can be aware, called the sensory threshold, the concentration at 0.15 ppm is the olfactory threshold, the average person can smell out, but also the health standard point. When the concentration reaches 1-10 ppm, it is called the stimulation range and above 10 ppm is poisoned.

When the ozone concentration is 0.02ppm, people with quick sense of smell can detect it, which is called the sensory threshold. When the concentration is 0.15ppm, it is the olfactory critical value, which can be sniffed out by ordinary people, and it is also the hygienic standard point. When the concentration reaches 1-10ppm, it is called the stimulation range, and above 10ppm is the poisoning value.<br>