Coriolis flowmeter utilizing three-forked plate vibrator mode

A Coriolis flowmeter which vibrates in a mode of three-forked plate vibration comprising:

• one substrate having conduits through which a fluid to be measured in connection with a flow rate thereof flows;
• a first curved tube, a second curved tube, and a third curved tube all of which are fixed to the substrate in parallel to each other in such a manner that one end of the first tube connects with one of the conduits, another end of the first tube connects with one end of the second tube through a conduit arranged in or under the substrate, another end of the second tube connects with one end of the third tube through a conduit arranged in or under the substrate, and another end of the third tube connects with another of the conduits under a condition that the fluid flows in the three curved tubes in a direction identical to each other;
• vibration generating means attached to the curved tubes which generate vibrations in such a manner that the neighboring tubes vibrate in opposite phases;
• and
• a sensor means for detecting a variation of vibration of the second tube which is caused by a Coriolis force occurring when the fluid flows through the second curved tube.