Electricitiy + Control February 2015

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Sensors for fluid engineering
Wenglor, has introduced a new state-of-the-art sensor measuring
product range dedicated to fluid engineering. Based on a patented
process which is unique in the field of flow sensor technology allows
theWenglorFluid devices to be mounted regardless of position and
flow direction and still provide precision measurements.
UniFlow sensors
These ascertain the flow velocities of oily and aqueous media
in closed piping systems. They do not have to be aligned to the
direction of flow during installation as heating and the
temperature sensor are located in the tip of the device.
UniBar pressure sensors
The sensor measures the relative pressure of any desired
media in closed systems within a range of -1 to +600 bar.
Wenglor pressure sensors with metallic membrane are
highly suited for areas with strict hygiene requirements
such as in food and pharmaceuticals. They are flush-
mounted and therefore compatible with pipe cleaning
devices.
UniTemp temperature sensors
The measure the temperature of liquid and gaseous media and
make it possible to monitor temperature within processes. They can
be used under greatly varying ambient conditions as the switching
points can be individually adjusted within a measuring range of
0 to 200 ºC. Wenglor is exclusively represented by Randburg-based
company, ASSTech.
Enquiries: Anastas Schnippenkotter.Tel. 011 708 9200
or email
Safety light curtains – linked versions
Leuze MLC 500 safety light curtains are now also
available as linked versions, says Gerry Bryant,
managing director, Countapulse Controls. “In
those instances where multiple-sided access
guarding is required or point-of-operation guard-
ing is to be combined with area protection as
stepping-behind protection, the use of cascaded
MLC devices reduces the cost of installation and
cabling considerably.” Rigid L and U-shaped
connections as well as variants with flexible
cable connections can be used. The host-guest
variants are Type 4 devices that provide reliable
protection without dead space and with maxi-
mum system availability. A particular feature is
that they are unusually slim (29 mm x 35 mm)
and extremely sturdy due to the slightly set back
front screens, reinforced side walls and metal end
caps. Installation of the MLC safety light curtains
is very easy due to the large variety of possible
mounting brackets. The Leuze MLC 500 series
includes the newest generation of extremely
sturdyType 4 safety light curtains.Three function
classes – Basic, Standard and Extended – enable
the most efficient use of devices from simple
standard applications to complex controlled
special safeguarding processes.The devices can
be used universally, due to metal end caps, a
flexible fastening concept and the option of form-
locking installation.There are also variants which
have an AIDA-compliant pin assignment. AIDA
is an acronym for Automatisierungs-Initiative
deutscher Automobilisten, or the Automation
Initiative of German Automobile Manufacturers.
The basic version of the Type 4 safety light cur-
tains provides the most important functions such
as range reduction on the transmitter, reversible
transmission channels, a LED display and auto-
matic start/restart interlock. Features include the
prevention of mutual interference of the sensors
by selectable transmission channels and range
reduction, if applicable.
Enquiries: Gerry Bryant.Tel. 011 615 7556 or
email
Ac current transducer with large window
NKTechnologies of San Jose, California, has released a new series of large
split-core ac current transducers. The large window measures 86 x 58 mm
and is available in four current ranges from 800A to 1 600A with the industry
standard 4 – 20 mA looped powered output.
Available from Denver Technical Products, the ATR series incorporates a
TRMS processor and will accurately read distorted wave forms.TheAT series
is a lower cost average responding unit.
. 011 626 2023 or email
ROUND UP SENSORS, SWITCHES + TRANSDUCERS
Electricity+Control February ‘15 24