Made to API/ASTM oil testing standards, Robinson’s 100mL 8-inch long cone centrifuge tubes are constructed from clear annealed glass, and feature etched white graduation lines for clear and accurate readings. These 200 part tubes are marked from 0 to 200% to allow direct volume readings from test samples. Tubes are available with the conventional neck opening to accept a cork style stopper (corks sold separately), or with a threaded neck to take a screw style cap (screw caps included).

As an added option, tubes can come factory verified or third-party certified. Factory verified tubes are accompanied by a certificate of accuracy. Certified tubes are volumetrically checked by an independent third-party laboratory according to API standards and come with a certificate depicting volume corrections at each checkpoint. (additional charges apply)

Divisions of Graduation:

• 0 to 1% in 0.1%
• 1 to 4% in 0.2%
• 4 to 6% in 0.4%
• 6 to 10% in 1%
• 10 to 20% in 2%
• 20 to 50% in 10%
• and at 100, 150, and 200%