Instrumentation & measurement
Coriolis flow meters
Coriolis flow meters measure mass flow directly by sensing the twist induced in vibrating measuring tubes as fluid passes through them. Many designs also report density and temperature, which makes them useful for dosing, blending and batch transfer.
Overview
A Coriolis meter drives one or two measuring tubes at their natural frequency. When fluid flows, the Coriolis effect causes a small phase difference between the inlet and outlet sides of the tubes, and this difference is proportional to mass flow rate. The vibration frequency changes with fluid density, so density is measured at the same time. Because the measurement is of mass rather than volume, it does not depend on fluid properties such as viscosity, which makes the principle attractive for valuable or variable-composition products.
Selecting the right Coriolis flow meter
Selection depends on the fluid and whether it contains entrained gas, the mass flow range, the allowable pressure drop, process pressure and temperature, and the wetted material needed for chemical compatibility. Larger meters are heavier and costlier, so line size and mounting space should be checked early. Agree the outputs, communication protocol and any hazardous-area requirement as well.
Information that speeds up a quotation
Share what you know. Anything you are unsure of can be marked “not known” — our engineers will help confirm it.
- Fluid
- Flow min
- Flow max
- Size
- Accuracy
- Pressure
- Temperature
- Signal
- Power
- Certification
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Flow measurement
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Frequently asked questions
What information do you need to quote a Coriolis flow meter?
Send the fluid name and composition, its density and viscosity if known, whether gas may be entrained, the minimum and maximum mass flow, operating pressure and temperature, the allowable pressure drop, pipe size and end connection, required outputs and communication, power supply, and any hazardous-area classification. A process datasheet is the most convenient way to share this information.
Does a Coriolis meter need long straight pipe runs?
Coriolis meters are generally less sensitive to flow profile than many other principles, so straight runs are not usually the deciding factor. Installation still matters: the meter should be well supported, kept away from strong external vibration where possible, and oriented so that the tubes stay full of liquid or drain as required. Guidance comes from the selected model's documentation.
Ready to specify coriolis flow meters?
Send the details you have — quantities, sizes, drawings or a part number. Unknowns are fine.