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DSL-220M - Lloyds Type Approved smoke opacity monitor for measuring visible opacity (0 – 100 %) in marine boiler and diesel engine exhaust gases.
DSL-230 MkIII – conventional single pass particulate monitor for measuring particulate density (mg/m³) in combustion and air filtration processes.
DSL-340 MkIII – unique double pass DDP dust monitor for measuring large diameter particulate density (mg/m³) in cement, steel and wood processes.