Coriolis mass flow meter measure mass through inertia. A liquid or gas flows through a tube which is being vibrated by a small actuator. This artificially introduces a Coriolis acceleration into the flowing stream, which produces a measurable twisting force on the tube resulting in a phase shift.Coriolis meters are extremely accurate. In fact, a Coriolis meter is often used as a stand... https://www.bjssae.com/v-shape-coriolis-mass-flow-meter-video.html