A Coriolis mass flow meter measures the mass flow rate of fluids by utilizing the Coriolis effect, a physical principle that describes how a moving mass behaves inside a rotating or oscillating system. Unlike traditional flow meters that measure volumetric flow, a Coriolis meter directly measures mass flow, making it highly accurate and independent of changes in temperature, pressure, viscosity, or density.
Inside the meter, one or two specially designed tubes are continuously vibrated at their natural frequency by an electromagnetic drive system. When no fluid is flowing, the vibration pattern of the tubes is symmetrical. However, when fluid begins to flow through the vibrating tubes, the Coriolis force causes a slight twisting or phase shift in the tubes. This deflection is extremely small but precisely measurable.
Sensors located along the tubes detect the time difference (phase shift) between the inlet and outlet vibration signals. The magnitude of this phase shift is directly proportional to the mass flow rate. The greater the flow, the greater the tube deformation and signal difference. The transmitter then converts this information into a mass flow reading.
In addition to mass flow measurement, Coriolis flow meters can simultaneously measure fluid density. Changes in density affect the vibration frequency of the tubes, allowing the system to calculate density in real time. With built-in temperature sensors, the meter can also provide temperature compensation and even calculate volumetric flow if required.
Because the measurement principle is based on mass rather than volume, Coriolis meters are ideal for applications requiring high precision, such as chemical processing, oil and gas, food production, and pharmaceutical manufacturing. Their ability to measure mass flow, density, and temperature in one compact device makes them one of the most versatile and reliable flow measurement technologies available today.
Post time: Feb-28-2026