Flowmeter Technology Library Resource Center
This nifty resource helps you find anything and everything you need to know about flowmeters without having to endlessly surf the web. It provides descriptions and general information for all flowmeter technologies used in process control and automation applications, and allows you to view online intelligence reports, white papers, articles, and technical book abstracts on all things related to flow and the flowmeter instruments that control and measure it.
Flowmeters measure, monitor, regulate and control the flow of industrial gases and fluids. Flowmeters also measure other parameters of liquids and gases commonly used in the process controls and instrumentation industries and are typically chosen based upon the nature of the fluid being calibrated. Considerations for flowmeter selection include viscosity of the liquid, operating pressure, temperature, and flow rate, all of which must be measured in advance.
A flowmeter is a device that meters movement of fluid in a conduit or an open space. This fluid could be water, chemicals, air, gas, steam or solids. Some of the most common types of flow meters include Coriolis, magnetic, ultrasonic, vortex, turbine and multiphase. Flowmeters are made of several basic technologies. Each type has a niche but can generally be used for other applications as well.
Types of Flowmeters
Coriolis Flowmeters are twisting meters that are used to measure mass flow as opposed to volumetric flow. These meters are known for their accurate readings however their size is limiting.
Magnetic Flowmeters are generally used for water applications. They are limited to conductive fluids and they operate on a voltage generator.
Mass Flowmeters are designed for use in gas flows where pressure and temperature are variable. They measure flow rate in terms of the mass of the fluid substance and have units such as lbs/min.
Mass Gas Flowmeters are less affected by density, pressure, and fluid viscosity. They use differential pressure transducers and temperature sensors.
MultiphaseFlowmeters are advanced types of flowmeters which accurately measure the flow rates of oil, gas, and water. These flowmeters dont have any moving parts and cause no separation or mixing.
Positive Displacement Flowmeters are used to measure the flow rate of fluids in areas where straight piping is not possible.
Turbine Flowmeters are mainly used for both liquids and gas. They operate best for applications that have steady, high-speed flows.
Ultrasonic Flowmeters are effective for measuring natural gasses. These meters are non-intrusive and they have no pressure drop. It is important that ultrasonic flowmeters work on clean fluids.
Ultrasonic Doppler Flowmeters are used in slurries and wastewater applications. They use the Doppler effect principle to measure the flow rate.
Variable Area Flowmeters, more commonly known as Rotameters, are used to measure the linear flow of gases and clean liquids.
Velocity Flowmeters and flow sensors measure flow rate in terms of how quickly the gas or liquid is moving. Velocity meters use units like ft/sec.
Volumetric Flowmeters measure flow rate in terms of the quantity of material that is flowing and use units like mL/min.
Vortex Flowmeters are mainly used as an alternative to differential pressure flowmeters. These meters work best with clean, low-viscosity, medium to high speed fluids.
Vortex Shedding Flowmeters are suitable for water flow and coolant flow. They are not mechanical meters like positive displacement or turbine meters and do not hang up.
Flowmeter Research Library
An Introduction to Flowmeters
An educational resource for students, industrial technicians and buyers that are either new to flowmeters or who have some general background knowledge about them but wish to have a broader understanding of flowmeters.
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CONTROL welcomes contributions from process automation professionals and controls engineers on anything to do with flowmeters that will help educate others.
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