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Magnetic cylinder sensor with ATEX approval
“T-slot talent” MZT 6
defies explosion potential
Ignitable gases or non-conductive dusts in the operating
environment are just the right environment for
the new MZT 6 with ATEX approval.
>> Right from the start, the MZT 6 proved itself as the magnetic
cylinder sensor for detecting the position of pistons in
pneumatic cylinders. The reasons: very user-friendly, immune
to vibrations, and with high switching accuracy. And
from now on “secure fixing and reliable function” (to summarise
the experience of many users of the “T-slot talent”) is
also possible in the Ex-Zone.
Give ground …
… is what many standard devices have had to do, as they do
not conform to the ATEX directive. In almost all cylinder Tslots
their place is increasingly being taken by the MZT 6
ATEX. It is approved for Ex-Zone 22, Category 3D/3G, among
others. The sensor is not just gaining ground, but often offers
users better and more reliable switching behaviour than
before. This has been made possible by a specially adapted
mounting technology, whereby the sensor is first inserted
from above – saving time. Then the MZT 6 is pressed onto
Growth capacity for capacitive sensors
CM family has no succession worries
SICK has extended its family of capacitive sensors
with further sensor variants. The CM 30 is now available
in a 2-wire design for an operating voltage of
250 V AC.
>> Increased switching distances of up to 25 mm and options
for flush or non-flush installation characterise capacitive
sensors from SICK – the new CM 30 AC too. Moreover,
all capacitive sensors share a special highlight: their high
level of electromagnetic compatibility. This reliably prevents
spurious switching caused by, for example, electrostatically
charged granulate in bulk material silos, mobile telephones
and radio devices, or from interfering voltages brought about
by magnetic valves, relays or frequency converters.
CM 18 PTFE: a tough guy with fine discrimination
Capacitive sensors are mainly used in applications for which
optoelectronic sensors are unsuitable because of the high
risk of contamination, for example. Now the CM 18 PTFE
goes one step further: the use of PTFE (Polytetrafluoroethylene,
also known as Teflon) for the housing and the M18
threaded connections allows the sensor to check the filling
levels of aggressive media, e.g. hydrochloric acid, sulphuric
acid, phosphoric acid, a variety of alkalis, and numerous
solvents. The same applies for object detection in
environments in which these materials can be present
as gases, steams or vapours. It is also suitable wherever
SICK insight 2/2004
the bottom of the pneumatic cylinder slot over its entire
length during fixing. Standard tools are sufficient to carry
out rapid and firm screwing of the slotted head or Allen
screw into the metal cylinder liner – and the sensor cannot
be ripped out.
Excellent against potential explosions – the new MZT 6 ATEX.
INFO 212
plants require frequent cleaning with chemicals or at high
temperatures. INFO 213
See page 17 for an application report.
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