5 considerations when purchasing a Coriolis mass flow meter
Coriolis instruments are not only the most accurate way to measure mass flow, they also have a number of other unique capabilities. Here are five important points to consider as you decide if a Coriolis meter is the right choice for your application.
1. Want to measure mass flow directly? Don’t know fluid density?
Coriolis meters use optical sensors outside of the flow path to detect variations in tube vibration, allowing them to measure mass flow, and fluid density, directly (see operating principles here). This measurement has no pressure dependence, and the only temperature effects are mechanical or electronic, so Coriolis instruments have much smaller zero shifts than other technologies.
2. Measuring aggressive fluids?
Coriolis meters can be materially compatible with a wide range of liquids and gases, including many aggressive fluids that are incompatible with other flow meter technologies.
Alicat’s CODA-Series of Coriolis instruments are available with all-metal seals, allowing for increased chemical compatibility with process fluids.
3. Operating under extreme conditions?
Coriolis meters can operate over a wide range of conditions, including very high temperatures and ultra-low flow rates.
CODA Coriolis instruments include units capable of measuring fluids down to 0.2 g/h between temperatures of -30°C and 105°C. They can also withstand burst pressures of up to 3x their operating (or proof) pressures – high pressure units have a burst pressure as high as 12000 psi.
4. Have unknown or changing fluid composition?
Measurements taken by Coriolis mass flow meters don’t rely on fluid properties (such as viscosity, density, or compressibility). This enables a Coriolis meter to provide accurate mass flow measurements even when the exact composition of the process fluid is unknown or changing.
5. Within your budget?
Coriolis mass flow meters generally measure with extremely high accuracy down to ± 0.1% of reading with a turndown ratio of over 100:1. This tends to make them cost quite a bit more, even up to 2x more than some other technologies.
CODA Coriolis instruments come in several different models at varying price points, so lower cost options available with trade-offs of decreased accuracy or vibrational insensitivity. Evaluate your options and speak to your Alicat rep if you have any questions.