Abstract: The use of polymeric materials as glass substitutes to make products suitable for use in the analysis of liquid samples and the corresponding products are disclosed herein. Polymer-based products suitable for use to analyze liquid samples may be particularly useful in petroleum industry applications. Specifically, a sample-testing apparatus, such as a centrifuge tube or hydrometer, for use with a sample containing materials such as crude oil, petroleum products, petrochemicals, fractions thereof, and impurities therein is disclosed herein.

Abstract: The use of polymeric materials as glass substitutes to make products suitable for use in the analysis of liquid samples and the corresponding products are disclosed herein. Polymer-based products suitable for use to analyze liquid samples may be particularly useful in petroleum industry applications. Specifically, a sample-testing apparatus, such as a centrifuge tube or hydrometer, for use with a sample containing materials such as crude oil, petroleum products, petrochemicals, fractions thereof, and impurities therein is disclosed herein.

Abstract: An automated sample mixing and centrifuging apparatus capable of mixing the contents of one or more centrifuge sample tubes and then centrifuging the sample tubes in the same apparatus is disclosed herein. The apparatus comprises an electric slip ring, one or more mixing actuators, a device motor, and a rotor.

Abstract: An automated volumetric measurement and verification system capable of measuring and verifying volumetric graduations on a container and methods of measuring and verifying volumetric graduations on a container using the disclosed volumetric measurement and verification system are disclosed herein. The volumetric measurement and verification system comprises a graduated container capable of containing a liquid, a camera, and one or more z-axis stages for positioning the camera. In embodiments of the disclosed system that are used to verify volumetric graduations, the system may further comprise a liquid dispenser and a balance, and the one or more z-axis stages may further position the liquid dispenser.