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The ozone measuring instrument is to use ultraviolet absorption principle, with a stable source of ultraviolet light produces UV, Lightwave filter to filter out other wavelength ultraviolet light, wavelength 253.7nm only allowed through. After sample photoelectric sensor through absorption by ozone pool, reach sampling sensor. Photoelectric sensor through samples and sample comparison of photo-electricity sensor signal, by means of mathematical models of calculation, we can concluded that ozone concentrations.