... fraction of C, S of steel, iron, alloy, mold and cores, nonferrous metal, cement, ore, coke, catalyst, magnetic materials, ceramic, ... the samples adequately and stability is good. 5. Snap-in type automatic sweeper( with patent ) and ultramicropore mental dust filter, ... can avoid the high-frequency interference thoroughly. CS-8800C Type High-frequency Infrared Carbon & Sulfur Analysis Instrument