Each centrifuge tube is hand calibrated for accuracy for the ASTM requirements and graduations are etched and marked with a durable white ceramic enamel unless otherwise stated.

D91 Precipitation Number of Lubricating Oils
D96 Water and Sediment in Crude Oil by Centrifuge Method
D1837 Volatility of Liquefied Petroleum (LP) Gases
D1966 Determination of Water and Sediment by Centrifuge Method
D2273 Trace Sediment in Lubricating Oils
D2709 Water and Sediment in Distillate Fuels by Centrifuge Method
D3904 Oil from Oil Shale
D4007 Water and Sediment in Crude Oil by Centrifuge Method