The Nexis SCD-2030 sulfur chemiluminescence detection system from Shimadzu features a horizontally positioned redox cell. This design ensures an ample reaction time and reaction zone within the cell, which promotes the sample’s redox reaction and achieves long-term stability. Moreover, the new design significantly simplifies changing the consumable pyro-tube and allows fast recovery of the instrument after maintenance. The system provides extremely high sensitivity for sulfur chemiluminescence by utilizing the industry’s first ultrashort flow path. As the flow path becomes shorter, the sensitivity for both peak area and signal-to-noise ratio increases by up to 2.5 times.