An oil centrifuge tube is a specialized piece of laboratory glassware consisting of a broad to pear-shaped length of glass open at the top and a markedly tapered bottom stem
Designed for field use in testing petroleum
Referenced in ASTM D4007 method to test for water and sediment in crude oil by centrifugation
Calibrated to contain; durable white ceramic enamel scale, legend and marking spot on each tube
Graduated in %; 100 ml equals 200%