A vibrating-reed mass-flow-meter.

Abstract

For many fluid-mass-rate-of -f low metering situations, a measure of the fluid's density-velocity product is required. The density -velocity (pv) product is multiplied by an effective conduit cross -sectional area to yield the mass-rate-of-f low. The area multiplication is accomplished by simply changing the scale of the pv-product indicator. The purpose of this paper is to show how a magnetically-driven vibrating reed can be used to measure either the pv product of a fluid or its mass-rate-of-f low through a conduit. The proposed meter differs from the rotating-vane mass-rate-of-f low meters in that it operates on a transverse rather than angular momentum exchange.