Ozone production Ozone production - (Extract from "Pay attention to specifications")
Most of negative ion generators which employ the discharging method generate negative ions and ozone simultaneously. Ozone gas is used for sterilizing/deodorant purposes but it is harmful to the human body if it is highly concentrated. The safety limit set by the Ministry of Health, Labour and Welfare is less than 0.1ppm (in working areas). Basically, a negative ion generator, which does not meet the safety standards, is not sold in the market. However, worn out ioznizing needles can generate highly concentrated ozone. Ozone itself has no odor but it can give off an offensive stimulating smell when it reacts with other substances in the air. You have to choose a product which meets safety standards and make sure if it does not give off the odor caused by the reaction if you do not like the smell.
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