Yokogawa Releases the
ADMAG AXF Series—World's First Magnetic Flowmeters with Electrode
Adhesion Diagnostic Function
Japan, July 7, 20003—Yokogawa Electric Corporation announces the release
of an upgraded version of its ADMAG series magnetic flowmeters, which can
measure liquid flow with high accuracy, and will launch marketing of this
as the ADMAG AXF series both inside and outside Japan on July 11.
Magnetic flowmeters make use of the physical phenomenon in which
conductive fluids generate electromotive forces in proportion to the speed
with which they pass through a magnetic field. They are sophisticated
devices that have no movable parts or other obstacles inside their
flowtubes, and measurement is not influenced by the presence of solid
objects in fluids. This makes them ideal for use in such industries as
pulp and paper, water supply, chemicals, food, and steel where the
calculation of a totalized flow, the reduction of pressure loss, and/or
the measurement of fluids containing solid objects is required.
In 1955 Yokogawa became the first manufacturer in Japan to develop an
industrial magnetic flowmeter, and in 1988 the company developed its ADMAG
series of magnetic flowmeters which employed a unique, noise-resistant
dual frequency excitation method. Yokogawa has been a technology leader in
this field ever since.
The ADMAG AXF series retains all of its predecessor's qualities while
differentiating itself from the competition with user friendly features
such as a new technology that monitors the adhesion of substances to
electrodes and an enhanced dual frequency excitation method. These and
other new features make this a truly easy to use product.
Yokogawa's magnetic flowmeters command the largest market share in Japan,
and the second largest group in the international market. With the launch
of this new series of integral type flowmeters and the simultaneous launch
of new remote type converters and remote flowtube type flowmeters,
Yokogawa aims to become the top manufacturer in this business segment
1. A world first: adhesion diagnostic function
The measurement accuracy of magnetic flowmeters is influenced by the
adhesion of fluids or the build-up of material on their electrodes, a
situation which requires periodical maintenance work. With conventional
flowmeters the maintenance interval must be calculated based on simple
experience and observation. Now, with the new adhesion diagnostic
function, it is possible to monitor the status of adhesion in real time.
This function issues alarms and also indicates on a full dot matrix LCD
what corrective measures must be taken. This enables the performance of
maintenance in a timely manner and reduces costs.
2. Increased resistance to fluid noise
Measurement of high concentration slurry, or fluids mixed with solid
objects, causes noise due to the solid objects brushing by the electrodes.
Another world first for the new ADMAG AXF Series flowmeters is the use of
enhanced dual frequency excitation to alleviate this noise. With this
enhancement, these flowmeters have 2.5 times the noise resistance of the
ADMAG series, which uses conventional (non-enhanced) dual frequency
3. Enhanced performance
The ADMAG AXF Series flowmeters have been enhanced by reducing the lower
limit for fluid conductivity from 5micro-S/cm (ADMAG series flowmeters) to
1 micro-S/cm and by improving their accuracy.
4. Improved user friendliness
The replaceable electrodes (as an option) used in the ADMAG AXF Series can
be removed for easy cleaning or replacement. These flowmeters also feature
a full dot matrix LCD that can display messages in Japanese (katakana) as
well as the standard English and indicate what type of maintenance work
must be performed when an alarm is issued.
German, French, Spanish, and Italian are now being prepared In addition to
these major improvements in usability, a wider range of nominal sizes and
process connections and the ability to change the position of the
electrical connection have been provided at user request.
ADMAG AXF will be available in Europe and North America in the near