Coriolis Mass Flow Meter
What Is Coriolis Mass Flow Meter?
Coriolis Mass Flow Meter is also known as inertial flow meter. It is widely used to measure mass flow rate in processes i.e. custody transfer in industries such as petroleum, chemical, pharmaceutical, pulp and paper, food, energy, and etc.
Coriolis Mass Flow Meter works on the principle of Coriolis force. It has two parallel vibrating tubes. A driver vibrates the tubes at the resonant frequency of the system. As the flow passes through the tubes, the fluid momentum coupled with the oscillatory motion created by the vibration induces a Coriolis force along the length of the tubes. This force causes the tubes to twist in opposite direction to each other and translates into a phase shift (or time delay) along the length of the tube.
Phase Shift is directly proportional to the Mass Flow Rate. Thus, by measuring the phase shift of the system, the mass flow rate can be measured. In parallel to the phase shift, the change in natural frequency can be measured. The change of natural frequency is directly proportional to the fluid density. By measuring the natural frequency, the fluid density is known. With the fluid density and its mass flow rate, we can derive the volume flow rate.