Patent ID: 8234931

Claim:
An assembly comprising: a fluid channel and a flowmeter, the flowmeter comprising a vortex shedder extending in the fluid channel, the vortex shedder being configured to generate Karman vortices in fluid flowing through the channel during operation, wherein the vortex shedder is provided with a first fiber Bragg grating of a fiber Bragg grating sensor, the provided first fiber Bragg grating being structurally integrated with a pressure variation receiving part of the vortex shedder to detect surface strain induced on the pressure variation receiving part by vortex pressure variations; and wherein a Karman vortex frequency of the vortices generated by the vortex shedder is detectable utilizing a fiber Bragg grating sensor signal relating to the respective first fiber Bragg grating of that vortex shedder.