An ozone analyzer is an ozone analyzer device used to monitor and record ozone levels in an oxygen or air sample. Ozone is one of the six criteria air pollutants monitored by regulatory agencies. It is formed naturally in the stratosphere by a reaction between oxygen and UV radiation. It absorbs harmful UV radiation and prevents it from reaching the ground level, protecting vegetation and humans on earth. This is why we need to monitor ozone levels in the atmosphere.
There are several types of ozone monitors available for use on the market. The two most common are electrochemical and photometric. The photometric ozone analyzer utilizes LED-based technology to measure ozone concentration using the photometric measurement method. Ozone concentrations are measured by passing a sample of the sampled gas through an absorption cell that is illuminated with UV light at a specific wavelength, 254 nm (ozone peak absorption). The intensity of the UV light that passes through the sample is detected by the sensor. A reference detector is also used to compensate for variations in the UV lamp output.
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Electrochemical ozone monitors work by diffusing a sample of the air into a sensor cell with electrodes and electrolytes. The presence of ozone molecules causes a change in conductivity of the electrodes that is recorded and converted into a numeric reading of ozone concentration, which is then displayed on the LCD. These sensors are the preferred choice for indoor ozone monitoring since they are more stable, provide clear and accurate results, and can distinguish ozone from other VOCs.
