1
Share:
Coriolis Mass Flowmeter
CMF Precision Series
A Coriolis Mass Flow Meter is an inline instrument designed to directly measure the true mass flow rate, density, and temperature of liquids or gases passing through a pipe.
Unlike volumetric flow meters (e.g., magnetic, turbine, ultrasonic), a Coriolis meter measures mass directly, making it immune to changes in fluid pressure, viscosity, temperature, or density.
How It Works: The Coriolis Principle
-
Vibration: Inside the meter housing, fluid passes through one or two curved (or straight) sensor tubes that are vibrated at their natural frequency by an electromagnetic drive coil.
-
Deflection / Twisting: As fluid flows through the vibrating tube, the inertia of the fluid causes the tube to twist in response to the Coriolis effect.
-
Phase Shift Measurement: Sensors placed at the inlet and outlet detect the degree of phase shift (time lag) in the tube's vibration. This phase shift is directly proportional to the mass flow rate.
-
Density Calculation: The oscillation frequency of the tubes varies based on fluid density (denser fluids cause slower vibration), allowing real-time density measurement simultaneously.
Key Technical & Operational Advantages
| Feature | Engineering & Operational Benefit |
| Direct Mass Measurement | Eliminates the need for external temperature/pressure compensation or complex calculations. |
| Multi-Variable Output | Delivers mass flow, volumetric flow, fluid density, and process temperature from a single device. |
| High Accuracy & Rangeability | Reaches up to ±0.05% to ±0.2% accuracy across wide turndown ratios with minimal drift over time. |
| No Moving Parts in Flow Path | Reduces wear, maintenance downtime, and pressure drop compared to mechanical meters. |
| Fluid Agnostic | Performs reliably with viscous fluids, slurries, non-conductive liquids, and variable chemical feeds. |
Common Applications
-
Custody Transfer & Billing: Fiscal metering where high accuracy directly impacts revenue (e.g., fuel bunkering, chemical batching).
-
Process Control & Dosing: Precise chemical injection, blending, or ratio control in industrial plants.
-
Density & Concentration Monitoring: Monitoring Brix (sugar concentration), alcohol content, or chemical concentration in real time.
Inquiry - Hydro-Air CMF Series Coriolis Mass Flow Meter