Negative oxygen ion meter is an instrument used to detect the concentration of negative ions in the air. Its working principle is to release a large number of negative ions to promote the aggregation and sedimentation of positive ions in the air, thus purifying the air and benefiting people's health. The concentration of negative oxygen ions is closely related to air quality, so the instrument plays an important role in air quality monitoring and environmental governance.

The negative oxygen ion meter can display the concentration of negative ions in indoor air through LED lights, thus helping people to judge the current air quality. It greatly improves the comfort of indoor air and can alleviate some health problems caused by air pollution. In addition, the negative oxygen ion meter is also helpful to improve the freshness of indoor air and provide a healthier, more comfortable and safer environment for people's daily life.

Although the negative oxygen ion meter has many advantages, it still needs to be used with caution. Long-term exposure to high-concentration negative ions will also have adverse effects on the human body, such as emotional irritability and depression; At the same time, higher concentrations of negative ions also have allergic reactions to some people. Therefore, when using the negative oxygen ion meter, it is necessary to control and adjust it according to the actual situation and one's own physique to ensure health.