Opacity Monitor are the automated internal
self-test equipments that are widely used in industrial chimneys and power
plants to measure the visible opacity of the exhaust gases expelling out of the
combustion chambers. These are used to maintain the level of the pollutants to
minimize the level of pollution in the atmosphere. Opacity Monitor works on the
light transmission techniques in which the high intensity light beam is
projected across the gaseous mixtures. The dust and other particulates present
within the mixture will attenuate the transmitted light and decrease the
intensity of light due to the scattering and the absorption which gives the
opacity value in terms of numbers as per the calibrated system.
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