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This product is now obsolete and has been replaced by the Polytron 5200, Polytron 5310, Polytron 8200 and Polytron 8310.
Drager Polytron Ex is a gas detector for the continuous monitoring of flammable
gases and vapours in the ambient air. The transmitter is designed for the harsh
industrial environment and uses industry standard 3-wire analog technology.
It converts the signal from a catalytic bead sensor to a 4 to 20 mA analog signal
that is proportional to the current gas concentration. Drager Polytron Ex offers
two different measuring ranges: 0 to 10 %LEL for an early warning system, and
0 to 100 %LEL as a standard range. For special applications, like monitoring under
the ceiling or in areas which are difficult to access, the sensor can be mounted
remotely using the sensing head Drager Polytron SE Ex in combination with the
transmitter Drager Polytron Ex-R.
Different versions -
The transmitter Drager Polytron Ex also
is available as a remote version. Instead
of the Ex-sensor there is a fix installed
shielded 3-core-cable coming out
the transmitter’s bottom side via a cable
gland. This is used to connect a remote
sensing head Drager SE Ex PR M or
Drager SE Ex LC M in applications where
the sensor is hard to access. The cable
length is 10 m.
Comprehensive explosion protection -
The transmitters Drager Polytron Ex and
Ex-R are certified acc. to the directive
94/9/EC (ATEX 95) and marked by II 2G,
indicating that they are suitable
to be operated in potentially explosive
atmospheres (zone 1 and 2).
Intrinsic Safety - Knowingly Drager designed the Drager
Polytron Ex without implementing the type
protection concept of heavy flameproof
encapsulation. This means lightweight
enclosure and easy installation and
maintenance. Parts of the transmitter such
as sensor cables and terminals, LC-display
and the calibration elements on the frontside
are intrinsically safe. No additional
zener barrier is necessary.
Measuring function for explosion
According to the directive 94/9/EC
(Annex II, chpt. 1.5.5) Drager Polytron Ex
(measuring range 100 %LEL) is
performance approved for 28 flammable
gases and vapours (acc. to EN 50054 /
50057 and EN 50271).
System solutions - The shock-resistant enclosure (EEx e) is
made of conductive, glass-fibre reinforced
polyester. Combined with a suitable 4 to
20 mA controller the Drager Polytron Ex
transmitters satisfy the customers’ needs
for maximum safety and system availability.
Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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|Keison International Ltd. trading as:
Keison Products, VoIPon Solutions & 4Gon