2008 Press Releases-26
Tokyo, Japan -
November 21, 2008
Yokogawa to Release ADMAG AXR Two-wire Magnetic Flowmeter
- High Performance Achieved Through Dual Frequency Excitation -
Yokogawa Electric Corporation announces the release of the ADMAG AXR, a two-wire magnetic flowmeter that achieves high performance by using the dual frequency excitation method, a world first. (See attached reference materials.) Until now, Yokogawa has offered only four-wire magnetic flowmeters with excellent functionality. By adding to its line-up a new two-wire magnetic flowmeter that simultaneously achieves high performance and low installation and running costs, Yokogawa aims to take the top share of the global magnetic flowmeter market. This product is scheduled for release in February 2009.
Background of Development
Magnetic flowmeters are used to measure the flow rate of conductive fluids such as water and chemicals. Most are of the four-wire type, which achieves high accuracy and performance by means of a dedicated power supply cable that is separate from the signal cable used for current output. In contrast, the two-wire type uses just one pair of wires for current output and power supply. As two-wire magnetic flowmeters require neither a dedicated power supply cable nor a power supply unit, their installation costs are significantly lower. However, conventional two-wire magnetic flowmeters have not met the process automation field's minimum performance requirements in such areas as measurement accuracy and stability, which explains why they have not been well accepted in the marketplace. As many companies now need to reduce their instrumentation costs, flowmeter suppliers are being called upon to develop products such as high-performance two-wire magnetic flowmeters
In response to this need, Yokogawa has developed a technology that can minimize electric noise in two-wire models to a level comparable to that of four-wire magnetic flowmeters, thereby achieving high measurement accuracy and stability.
The Magnetic Flowmeter Market
Global sales of magnetic flowmeters totaled US$730 million in 2006 and are projected to reach US$870 million by 2011, a 20% increase. This can be attributed to infrastructure building in emerging markets and a steady increase in capital investment centering on chemical, pharmaceutical, and electric power plants*1. Although two-wire magnetic flowmeters have accounted for only a small share of the world magnetic flowmeter market because of performance concerns, the availability of this high-performance two-wire model means that there is now significant opportunity for growth.
Yokogawa is one of the top suppliers of magnetic flowmeters in the global market, with a 12% share*1. By launching this new product, Yokogawa aims to take an 18% share by 2010.
Major Target Markets
A wide range of industries such as chemicals, iron & steel, and food & beverages
Fluid flow measurement
- Reference -
Magnetic flowmeter operating principle
The operation of a magnetic flowmeter is based on Faraday's Law, which states that when conductive fluids pass through a magnetic field they generate electromotive force in proportion to flow velocity. The electromotive force is generated in a direction perpendicular to the direction of the fluid motion and the magnetic field, according to Fleming's Right-hand Rule.
The magnetic flowmeter detects this electromotive force by using a pair of electrodes installed inside the measuring tube, calculates the flow rate, converts it to 4-20 mA and pulse signals, and outputs them. It is one of the most accurate industrial flowmeter types. It has no movable parts or other obstructions inside the measuring tube, can be used with corrosive fluids, and is maintenance-free. Magnetic flowmeters are therefore extensively used in such industries as chemicals, food, iron & steel, pulp & paper, and water supply.
Features of dual frequency excitation method
The dual frequency excitation method is a Yokogawa innovation. With this method, a magnetic field is generated (excitation) by supplying a current with two high and low frequency components through the flowmeter coil. Having both the advantages of low frequency excitation (stability) and high frequency excitation (noise resistance), this method offers greater accuracy and stability than the single frequency excitation method.
Yokogawa's global network of 19 manufacturing facilities and 89 companies spans 32 countries. Since its founding in 1915, the US$4 billion company has been engaged in cutting-edge research and innovation, securing more than 7,500 patents and registrations, including the world's first digital sensors for flow and pressure measurement. Industrial automation and control, test and measurement, information systems and industry support are the core businesses of Yokogawa. For more information about Yokogawa, please visit our web site at www.yokogawa.com.