Patent ID: 6336369
Filing Date: 2002-01-08
Classification: G01F

Abstract:
A double-tube type Coriolis flow meter comprising:a straight flow tube defining a space through which the fluid being measured flows; a hollow outer tube disposed concentrically outside said flow tube, said hollow outer tube having a first end and a second end; a first sheet member securing said flow tube to said first end of said outer tube; a second sheet member securing said flow tube to said second end of said outer tube such that with said first end and said second end secured to said flow tube, said outer tube functions as a counterbalance, each of said first sheet member and said second sheet member having a resiliency so as to absorb a difference in elongation between said flow tube and said outer tube which is caused due to thermal stress; a drive unit; and a pair of sensors, said flow tube being caused to vibrate by said drive unit so that the mass flow of said fluid being measured is measured by detecting with said sensors a phase difference proportional to Coriolis force acting on said flow tube as a result of the vibration.