How does a Coriolis mass flow meter work?
The Coriolis mass flow meter is based on the Coriolis principle. It makes the flow tube through which the medium flows vibrate. The sensor detects and analyzes the changes in the frequency, phase difference and amplitude of the flow tube, directly measures the mass of the medium currently flowing through the flow tube, and calculates the density from the vibration frequency. It can also measure multiple process variables of the pipeline, such as mass flow, volume flow, density, and temperature.
Coriolis Flow Meter vs. Thermal Flow Meter
Coriolis flow meters measure mass flow directly. Direct mass flow measurement reduces inaccuracies caused by fluid properties. Thermal flow meters measure mass flow indirectly. Because of the way they measure, there are fundamental differences between the two devices, and therefore different applications for which each is suitable.
Thermal mass flow meters use the heat capacity of the fluid to measure mass flow. The device is equipped with a heater and 1 or 2 temperature sensors for heating (1 sensor) The power applied or the temperature difference between the 2 sensors is directly proportional to the fluid mass flow rate. Thermal mass flow meters are mainly used for gases.
Because the Coriolis principle directly measures mass flow, Coriolis flow meters can be used for both gases and liquids.
Applications
Coriolis mass flowmeter can be used to measure the mass flow of changing or unknown gas or liquid mixture or to measure supercritical gas. It not only directly measures the mass flow rate without being affected by the physical properties of the fluid, but also has high accuracy and good repeatability. Coriolis flowmeter is a flexible, reliable and accurate flowmeter.
