airpointer®Ozone (O3)
Ozone is a highly poisonous, corrosive substance and a common pollutant. Ozone is formed in the atmosphere by reaction of nitrogen oxides, hydrocarbons, and sunlight. Some kinds of electrical equipment, e.g. television sets, photocopiers and electric motors (which use brushes), generate such an amount of ozone that a person can easily smell.Health and Environmental Effects
Acute effects include respiratory symptoms, changes in pulmonary function, increased respiratory sensitivity and respiratory inflammation. Ozone damages the leaves of trees and other plants (photooxidation), deteriorating the appearance of cities, national parks, and recreation areas.Ozone and the airpointer®
The concentration of ozone is measured by Ultraviolet Photometry. From a high energy UV lamp a beam is directed through a tube, which is filled with the sample gas. The decrease of the light’s density, resulting from the presence of ozone, is measured with a detector at the end of the tube.| Component | EU Directive Method | Principle of Measurement | Range | Units | Lower Detectable Limit | Zero Drift | Span Drift |
| Ozone (O3) | Ultraviolet Photometry (EN 14625) | UV Photometry | Dynamic range up to 20 ppm | ppm,ppb, μg/m3, mg/m3 | 0.5 ppb | < 1.0 ppb | ± 1 % of reading or 1 ppb (whichever is greater) |