GD-8019B Existent Gum Tester

GD-17144 Micro Method Carbon Residue Tester

GD-0165 Vacuum Distillation Tester

GDD-1A Automatic Volumetric Karl Fischer Mositure Titrator

GD-1792 Distillate Fuels Mercaptan Sulfur Tester

GD-511B Mechanical Impurity Tester (Weight method)

GD-8018D Gasoline Oxidation Stability Tester (Induction period method)

GD-0175 Distillate Fuel Oil Oxidation Stability Tester

GD-8017A Petroleum Products Vapor Pressure Tester（Reid Methods）

GD-0308 Lubricating Oil Air Release Value Tester