MASS FLOWMETER

摘要

The invention concerns a mass flowmeter for measurement of the mass and the density of a fluid flowing through a measuring pipe. The mass flowmeter uses the Coriolis principle for establishing mass and density. The mass flowmeter comprises at least one, preferably two, measuring pipes. Each measuring pipe is provided with an oscillation generator and a first oscillation detector and a second oscillation detector. The oscillation generator is meant for making the measuring pipes oscillate, and the oscillation detectors are meant for detecting oscillations in the measuring pipes when fluid flows through the measuring pipes. The oscillation detectors consist of armatures in the form of bar magnets extending into a ring coil. The coil is provided with a first winding and a second winding which are connected in series, and which are arranged at a distance from one another along a longitudinal axis. The first winding is wound in one direction around a longitudinal axis, and the second winding is wound in another, and in relation to the first winding, opposite direction around the longitudinal axis. This means that the measuring accuracy is increased, and at the same time the demand on mounting tolerances is reduced.