Single pass opacity measurement
The DSL-220 opacity monitor uses a single pass light transmission measurement technique, whereby a transmitter emits a light beam that passes across the stack to a receiver which measures its intensity. Increased particulate or smoke density in the stack gas attenuates the transmitted light and lowers the intensity of the received light. This reduction is measured and presented as a percentage of opacity. The higher the level of particulate or smoke, the more light lost and therefore, the greater the opacity.
The low-cost monitor is simple to install, reliable and easier to access for maintenance compared to other opacity monitors on the market. It has a SWAS configuration – Short path, Wall mount OI, AC power supply and Stainless-steel air purge body.
The engineer responsible for specifying, purchasing, installing and operating the new Acoem monitors has been extremely enthusiastic about their performance. In particular he noted that Acoem monitors have made a significant improvement to the way his manufacturing plant ensures that its engines are meeting environmental standards.