Coriolis flowmeter

A Coriolis flowmeter configured to drive flow tubes and detect a phase difference and/or a vibration frequency proportional to a Coriolis force acting on each of the flow tubes, to thereby determine a mass flow rate and/or density of a fluid to be measured, which flows through the each of the flow tubes,

• the Coriolis flowmeter comprising manifolds arranged at both end portions of the each of the flow tubes,
• wherein a number of the flow tubes is set to an even number,
• wherein a channel of each of the manifolds comprises, as shaping portions therefor:
• a pipe-side opening portion arranged close to a pipe to which the Coriolis flowmeter is to be installed;
• tube-side opening portions arranged close to the flow tubes, a number of the tube-side opening portions being equal to the number of the flow tubes;
• and
• a channel branching portion to be branched corresponding to the number of the flow tubes,
• wherein areas of branching portion sectional shapes of the channel branching portion are set equal to each other, and
• wherein a channel sectional area in a range of from the channel branching portion toward the tube-side opening portions is set so as to be prevented from becoming larger than the areas of the branching portion sectional shapes.