1. When purchasing a negative ion generator, you can bring a semiconductor radio on your body, and it is better to have no interference within 30 cm of the negative ion generator.

2. According to the principle that the gravitational force between the positive and negative electrodes can be converted into electrical energy, the negative ion generator is placed in the center of the spacious house. The tester rubs the fluorescent tube back and forth with dry silk, and then brings the other end of the tube close to the generator. export. If the lamp can appear pale light at 30-50 cm, it proves that the generator has good performance. If the light must be emitted at 5-10 cm, it proves that the generator performance is poor. If the lamp tube repeatedly rubbed by silk is directly close to the outlet of the generator and still does not flash, it means that this product basically cannot play a role in medical care.

3. Put the back of the hand close to the outlet of the negative ion generator 10 cm, there will be a cool breeze with a fresh smell and cool breeze, there is no static thug, this is the negative ion wind. The windy and odorous ones are qualified negative ion generators.

4. The negative ion generator will generate ozone when the high voltage discharges, and the high ozone depth is harmful to the human body. There should be no ozone smell (similar to wheatgrass smell and fishy smell) at 0.3 meters from the negative ion generator, or no dizziness after a few minutes, it is a qualified frontal negative ion generator.

5. Use an international negative ion detector to measure positive ions at the outlet of the negative ion generator. The amount of positive ions is similar to or less than that in the air. This negative ion generator is very good.