FlowTime Clock ...
flowtime is it?
Time displayed is Flowtime.
Ultrasonic flowmeters were first introduced for industrial use in 1963 by Tokyo Keiki (which later became Tokimec) in
Tokyo, Japan. In 1972, Controlotron (Hauppauge, New York) became the first U.S. manufacturer to market ultrasonic flowmeters in the United States.
In the late 1970s and early 1980s, both Panametrics (Waltham, Massachusetts) and Ultraflux
(Poissy Cedex, France) experimented with the use of ultrasonic flowmeters to measure gas flow. Initially, ultrasonic flowmeters were not well understood, and were sometimes misapplied. Many technological improvements have been made in the past 10 years, and the limitations of ultrasonic meters are better understood. Advances in transit time technology have broadened the types of liquids that transit time flowmeters can be used on. Many transit time meters today can handle liquids containing some impurities.
There are two main types of
ultrasonic flowmeters: transit-time and Doppler. Transit-time ultrasonic flowmeters are distinguished according to the number of “paths” they
have. Multipath ultrasonic meters have three or more paths.
on these topics:
In 1998, the American Gas Association (AGA) approved the use of ultrasonic flowmeters for custody transfer applications. Since that time, suppliers have researched multipath meters and brought out new products.
The main suppliers of ultrasonic flowmeters for custody transfer of natural gas include Emerson Daniel,
Elster-Instromet, Sick, and FMC Technologies. More recently, KROHNE has also released the Altosonic V12, a 12 chord meter for custody transfer of gas applications. Cameron, which has traditionally had petroleum liquid applications, has released the LEFM 380Ci, an eight path ultrasonic meter for natural gas applications.
Most ultrasonic multipath meters for custody transfer of natural gas have four, five, or six paths. However, in May 2011, Elster announced a new six-path ultrasonic gas meter that has six paths and sixteen chords. The additional number of chords enables the flowmeter to take into account flow profile and turbulence, and provides additional diagnostic capabilities.
Two companies that are prominent
in custody transfer of petroleum liquids are Caldon (now a division of Cameron) and Faure Herman
(www.faureherman.com). Caldon used to have ultrasonic meters designed primarily for the nuclear industry. However, in recent years, the company has expanded its application range to include the oil and gas industry. Caldon has two-path, four-path, and eight path meters for liquid applications. The company was acquired by Cameron in January 2006. Caldon’s flowmeters are among the most expensive ultrasonic meters made.
Faure Herman, which is based in France, is well known for its helical blade turbine
flowmeters. However, it also offers what it calls an 18-path ultrasonic flowmeter for custody transfer of liquids. In addition to custody transfer, Faure Herman’s ultrasonic flowmeter is designed for process applications. Faure Herman was acquired by IDEX Corporation in February
2007. IDEX sold the company to Le Garrec & Co. in 2017.
KROHNE is another company that has made its mark in custody transfer of liquids, with its ALTOSONIC V and ALTOSONIC III offerings.
about New Technology Flowmeters:
Important historical events in the
ultrasonic flowmeter market
introduces ALTOSONIC V-6, which is designed for non-custody transfer
gas flow measurement
introduces ALTOSONIC V-12, which is designed for custody transfer gas
flow measurement. The V-12 has 12 chords.
Sensing releases SENTINEL LCT (Liquid Custody Transfer) and SENTINEL
LNG (Liquefied Natural Gas)
releases the FUT1010, an ultrasonic flowmeter for the hydrocarbon
industry; available for both gas and liquids
Plzen adds the FLOWMIC and SONOELIS to its ultrasonic water industry
Daniel introduces the 3812 Liquid Ultrasonic Flowmeter
introduces the Q.Sonic Plus Ultrasonic Flowmeter at the American Gas
Association (AGA) Conference in Nashville, TN. The Q.Sonic Plus has
six paths and 16 chords.
(Caldon) displays its new eight-path LEFM380Ci gas flowmeter for
custody transfer at the North Sea Workshop in Norway
Meter acquires Racine Federated
introduces its OPTISONIC 7300 Ultrasonic Flowmeter for process gas
PLC acquires Elster Group
further information on ultrasonic flowmeters, including detailed market reports,
please see www.flowultrasonic.com.