Coriolis Mass Flowmeter - Vibrating Tube Design, High Precision Measurement Technology

The French mathematician Gustave Coriolis formulated the principle that underlies Coriolis flowmeters. Coriolis showed in 1835 that an inertial force needs to be taken into account when the motion of bodies in a rotating frame of reference is described. The earth is often used as an example of the Coriolis force. A hypothetical object thrown from the North Pole to the equator appears to vary from its intended path, due to the eartha s rotation. Coriolis flowmeters contain one or more vibrating tubes. These tubes are usually bent, although straight-tube meters are also available. The fluid to be measured passes through the vibrating tubes. It accelerates as it flows toward the maximum vibration point, and slows down as it leaves that point. This causes the tubes to twist. The amount of twisting is directly proportional to mass flow. Position sensors detect tube positions.