WDL-9000A High precision microcomputer automatic sulfur tester (24 samples at a time)
WDL-9000B High precision microcomputer automatic sulfur tester (21 samples at a time)
WDL-8000A high precision microcomputer automatic sulfur measuring instrument
WDL-8000B microcomputer liquid crystal rapid integrated sulfur
CHN-8000B Automatic hydrocarbon nitrogen Analyzer (1-36 samples)
JC-8 microcomputer automatic glue layer tester (Coal Y value)