SH6533A Crude Oil Moisture & Sediment Centrifuge Analyzer for Petroleum Lab Test Standard: ASTM D4007 ASTM D1796 GB/T 6533 SH6533A crude oil moisture and sediment analyzer is designed for the determination of water and sediment in crude oil (centrifuge method) and complies with the GB/T 6533-2012 standard. It measures water and sediment in crude oil using the centrifuge separation method, serving as an ideal separation device for moisture testing in the petroleum extraction