Coriolisflödesgivare

Coriolisflödesgivare, also known as Coriolis flowmeters, are devices used to measure mass flow, density, and temperature of a fluid. They operate based on the Coriolis effect, a phenomenon observed in rotating systems. When a fluid flows through a vibrating tube, it experiences a force perpendicular to its direction of motion and the axis of vibration. This force, the Coriolis force, causes a twist or deflection in the tube.

The magnitude of this deflection is directly proportional to the mass flow rate of the fluid passing through the tube. The Coriolisflödesgivare has two vibrating tubes. Sensors on each tube detect the phase difference between the vibrations at the inlet and outlet. This phase difference is a measure of the Coriolis force and, consequently, the mass flow rate.

In addition to mass flow, Coriolisflödesgivare can also determine fluid density. By analyzing the natural resonant frequency of the tubes, which changes with the density of the fluid filling them, the density can be calculated. Temperature measurements are typically integrated into the device for compensation and accurate readings under varying conditions.

These flowmeters are highly accurate and are not affected by fluid properties such as viscosity, pressure, or temperature changes, making them suitable for a wide range of applications across industries like chemical processing, oil and gas, food and beverage, and pharmaceuticals. They are particularly useful for measuring difficult fluids, including slurries and gases. The Coriolisflödesgivare offers direct mass flow measurement, eliminating the need for separate temperature and pressure compensation calculations that are often required with volumetric flowmeters.