TPi April 2008

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April 2008 Tube Products International 55
EquipmentPipel ine Inspect ion
critical applications, such as brewing,
food processing, the dairy industry,
agriculture, cosmetics and chemical
dosing in water treatment processes.
In addition, current changes in the
pharmaceuticals sector from batch to
continuous production, with consequent
downsizing of plant and pipework, make
it increasingly relevant to that industry.
Magnetic or electromagnetic flowmeters,
commonly known as mag meters, are a
common method of flow measurement,
because they are easy to maintain, with
no moving parts, and offer a high level
of accuracy. Operation is based on
Faraday’s law of magnetic induction,
with the liquid acting as a conductor
as it flows through the mag meter; this
indicates a voltage proportional to the
average flow velocity, which is picked
up by sensing electrodes mounted in
the pipework.
Thus the fluid must be electrically
conductive to induce measurable
voltage, and most standard magnetic
flowmeters operate with fluids down
to around 15-20 microSiemens/cm
(measure of conductivity).
In contrast, Bronkhorst’s compact
magnetic flowmeter handles a
minimum electrolytic conductivity of
5µS/cm as standard, with certain
liquids measurable down to as low as
0.1µS/cm, or virtually non-conductive
fluids. It also offers an accuracy of 0.2%
of reading (with greater precision available
if required), high speed response and
a totally unobstructed flow path. Due
to its compact size, the Miniature-Mag
does not need to be installed on a
run of straight pipework, as with other
mag meters or vortex and ultrasonic
flowmeters, but can be tucked away on
bends or other confined spaces.
With a footprint measuring just 100mm
high x 100mm wide x 80mm deep, and
weighing just 800g, the Miniature-Mag is
housed in an IP67 rated dust- and water-
tight housing, with the body available as
standard in chemical-resistant PVDF
or optional PTFE (Teflon), PVC or POM
materials. A separate electronic display
unit features a 2 line, 16 character text
readout, giving push button control of
batch counting, pre-set alarms, menu
selection and other functions.
The Miniature-Mag can also be specified
as a flow controller, with an integral PID
loop for control valve operation or direct
pump control. Analogue, pulse, relay,
RS232 and serial output connections
are optional for interfacing with plant-
wide control networks.
Bronkhorst UK – UK
Bronkhorst’s ultra-compact electro- S S
magnetic flowmeter can measure liquids
with conductivity as low as 0.1µS/cm
TUBETECH CORPORATION LIMITED
TUBETECH WUHU MANUFACTURING CO.,LTD
Add: Room 1002,Building No.13,Lane 100 Yinxiao
Road, Shanghai, 201204 China
Tel:+86-21-5045 1844 Fax: +86-2150451464
SS SMLS Tubes EN10216-5, ASTMA269/A213 DIN 17458 JIS 3459.
Material: 304/304L, 316/316L, 321,321H etc.
SS Coiled tubes ASTMA269 TP304/304L 316/316L
Low carbon Coiled Tubes: 1008, 1010
Coil length: 200-500 meters
Cold draw and Honed cylinder tubes DIN 2391, Tolerance H7-H9
Material: ST45 ST52 Inner roughness: 0.2-0.8um
90/10, 70/30 Cu-Ni pipe fitting & Flange as per DIN/EEMUA
ISO 9001-2000 Approved
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