With Port Authorities around the world increasingly regulating emissions from ships, the SM-202M Smoke Opacity Monitor is an optical instrument specifically designed to measure the visible opacity of smoke emissions within the marine industry.
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In 2020, the International Maritime Organisation set new global standards to lower ship emissions. Shipping companies and port authorities around the world are legally obligated to enforce and comply with these regulations.
This optical instrument was specifically designed to measure the visible opacity of smoke emissions within the marine industry and more than 2000 have already been installed on ships worldwide.
Based on a Transmitter/Receiver arrangement, a light beam emitted from the Transmitter passes across the stack to a Receiver, which measures the intensity of the received light. Increased smoke density in the stack gas attenuates the transmitted light and causes the intensity of the received light to fall.
This reduction in intensity is measured and presented as a percentage of opacity. The higher the level of smoke present, the more light lost and therefore the greater the opacity. A reading of particulate density is also available measured in mg/m³.
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