Flow Measurement
Delivering unparalleled, real-world performance and measurement stability and repeatability – time and time again. Trust the industry-leading products of Emerson together with Automation Control Solutions to deliver unparalleled performance, reliability and confidence.
Principles of Coriolis Technology
The basic operation of Coriolis flow meters is based on the principles of motion mechanics. As fluid moves through a vibrating tube it is forced to accelerate as it moves toward the point of peak-amplitude vibration. Conversely, decelerating fluid moves away from the point of peak amplitude as it exits the tube. The result is a twisting reaction of the flow tube during flowing conditions as it traverses each vibration cycle.
Importance
A Coriolis meter is based on the principles of motion mechanics. When the process fluid enters the sensor, it is split. During operation, a drive coil stimulates the tubes to oscillate in opposition at the natural resonant frequency. As the tubes oscillate, the voltage generated from each pickoff creates a sine wave. This indicates the motion of one tube relative to the other. The time delay between the two sine waves is called Delta-T, which is directly proportional to the mass flow rate.
Products
Improved reliability, unparalleled process insight, and an intuitive operator interface deliver industry-leading performance.
Advantages of Magnetic Technology
Magnetic flow meters are often selected because they are obstructionless, cost-effective for aggressive chemicals and slurries and provide highly accurate volumetric flow measurement. A range of liner materials, electrode options and line sizes accommodate a wide variety of process applications. Additionally, magnetic meters are beneficial in that they can measure fluids bi-directionally, are effective for both very low and high volume flow rates and are immune to changes in process variables.
Flow Measurement
How It Works
Electromagnetic flow meters, or magmeters, are comprised of a transmitter and sensor that together measure flow. The magnetic flow meter’s sensor is placed inline and measures an induced voltage generated by the fluid as it flows through a pipe. The transmitter takes the voltage generated by the sensor, converts the voltage into a flow measurement and transmits that flow measurement to a control system.
Products
Intelligent meters for custody transfer and fiscal oil and gas measurement that deliver advanced diagnostics for unparalleled accuracy and reliability.
Products
Time-tested & rooted in industry standards, DP flow meters are accurate, reliable and easy-to-maintain for gas, liquid and steam applications. Innovative products enhance your flow measurement capabilities by expanding on time-tested and proven technology.
Reliable Flow Solutions Across Many Applications
With over 30 years of engineering experience, Emerson offers a complete range of DP flow solutions, including factory-assembled flow meters. Rosemount™ and Daniel™ DP flow products offer best-in-class performance and innovative designs to maximize efficiency in a wide variety of applications.
Improve Productivity with DP Flow Measurement
As one of the most common technologies for measuring flow in a pipe, differential pressure flow (DP Flow) measurement has a long history of achieving high accuracy and repeatability. The DP flow rate of process fluids is derived from the pressure differential caused by an engineered restriction within the pipe. This unique and scalable measurement technology enables integrated pressure, flow and temperature solutions and provides reliability and increased plant productivity.
Products
Simplify installation, maintenance and verification using a gasket-free meter design to ensure maximum process reliability.
Advantages of Vortex Technology
Vortex flow meters offer many advantages for flow measurement including easy installation without impulse lines, no moving parts to maintain or repair, less leak potential and a wide flow turndown range. Vortex meters also offer very low power consumption, allowing for use in remote areas. Additionally, Vortex meters are unique in that they can accommodate liquids, gasses, steam and corrosive applications. Vortex flow meters are also able to withstand high process pressures and temperatures.
Von Kármán Effect
Vortex flow meters measure fluid velocity using a principle of operation referred to as the von Kármán effect, which states that when flow passes by a bluff body, a repeating pattern of swirling vortices is generated.
In a Vortex flow meter, an obstruction in the flow path, often referred to as a shedder bar, serves as the bluff body. The shedder bar causes process fluid to separate and form areas of alternating differential pressure known as vortices around the back side of the shedder bar.
Products
Field-proven, cost-effective technology for repeatable custody transfer & fiscal liquid measurement with high flow rate applications.
Products