Electricity + Control May 2015

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Touch sensor – start, stop, acknowledge
ifm’s KT capacitive touch sensors can be
used, for example, as a start and stop func-
tion on machines or as an enable switch
for opening and closing gates. Compared
to mechanical switches the sensors oper-
ate without wear. Dynamic touch sensors
can detect an approaching human hand
and suppress interference such as water,
layers of ice or foreign bodies to a large
extent. Even a gloved hand will still trigger
them. Static touch sensors detect hands
and objects through glass for as long as
the sensing face is covered which provides,
for example, protection against vandalism.
With the latching operating principle it is
possible to switch the sensor on by touching
briefly and to switch it off again by touching
briefly.The housing is resistant to oils and
it is also impact and scratch resistant. Sym-
bols on the sensing face can be selected
separately.The sensor offers the protection
rating IP 69Kand a wide temperature range
from -40 to 85 °C. LEDs for optical feedback
signal that the sensor has been activated.
The green LEDs can be controlled separate-
ly and, for example, be used to indicate the
status of plant and machinery. Installation
alignment of the sensor is not necessary
since the clip showing the symbol for the
sensing face is snapped in as the last step.
Wiring is done via the tried-and-tested 3- or
4-wire technology.
. 012 450 0370 or
email
Launching ergonomic design thermal imagers
Comtest has introduced Fluke’s new Expert Series
thermal imagers – the TiX560 and TiX520 to the
southernAfrican market. Users of infrared devices
need maximum flexibility with an ergonomic de-
sign that allows for easy navigation over, under and
around hard-to-reach objects. With an articulating
lens that rotates a full 180 ° with the FlexCam lens,
and the largest 5,7 inch touchscreen LCD, Fluke’s
newTiX560 andTiX520 can aim and focus from a
comfortable angle and easily capture the target that
was once impossible to see.
They also feature the largest LCD touchscreen
and leading spatial resolution for a 320 x 240 in-
frared camera in its class – meaning 150 % more
viewing area, making it easier to annotate, edit and
analyse images.
Getting in-focus images can be painstaking with
manual focus systems, and some autofocus sys-
tems may not be exactly what is required for the
task. Fluke Professional and Expert Series cameras
include some of the most innovative focus tech-
nologies available, such as Fluke’s LaserSharpAuto
Focus. Image Sharpening allows for premium im-
age output in high temp applications by combining
multiple sequential frames of data into one (TiX560
only). Fluke uses only 100 % diamond-turned ger-
manium lenses covered with a specialty coating.
The best spatial resolution has the largest num-
ber of detector pixels within the smallest field of
view. This combination is measured in mRads,
and the smaller the number, the more detailed the
image. Fluke thermal imagers’ mRads range from
0,6 mRad (best) to 56 mRad, while competitive
models range up to 10,3 mRad.
. 010 595 1821
Speed sensors for drives and axes
The high switching frequency of 15 000 Hz, as well as the extended temperature range of – 32 to125 °C,
make the new MX5 magnetic speed sensors from ifm the perfect partner for the detection of rotational
speed and direction of rotation on axes, drives and shafts.The detection of both direction of rotation and
rotational speed is integrated into one housing.With fully electronicmagneticmeasuring cells, the sensors
function reliably without contact, even in the case of heavy soiling.They are ‘magnetically biased’ with
an integrated permanent magnet.The ferromagnetic teeth on a toothed wheel alter the existingmagnetic
field so that a corresponding switching signal can be generated.The sophisticated housing concept of-
fers different combinations of housing lengths and connections, such as straight or angled cable outlets
and AMP connectors.Toothed wheel modules made of metal are standardised and have a defined tooth
width and distance.The flanged housing offers quick mounting and accurate adjustment of the sensor
with only one screw.This reduces phase shift and guarantees precise detection of the toothed wheel.
. 012 450 0370 or email
ROUND UP SENSORS, SWITCHES + TRANSDUCERS
FLUKE IR TiX500 expert series. FLUKE IR TiX500 precise
focused images.
29 May ‘15 Electricity+Control