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Drager Polytron IR
Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
This product is now obsolete and has been replaced by the PIR 7000, Polytron 5700 and Polytron 8700.
The Drager Polytron IR is an explosion proof infrared gas detector for continuous
monitoring of combustible gases and vapours. With its stainless steel body and
drift free optics this transmitter is built for the harshest offshore environments.
Two models working with different wavelengths cover a broader range of detectable
The new model type 340 extends the area
of applications for the Drager Polytron IR
product line. The new wavelength of the
Drager Polytron IR type 340 offers
detection of alkanes at an even higher
sensitivity. The possible monitoring of
cyclohexane presents one of various new
options for gas detection resulting from
With both transmitter models Drager
Polytron IR type 340 and type 334,
Drager Safety defines the status quo of
measurement technology for continuous
monitoring of ambient air regarding
combustible gases and vapours. Drager
Polytron IR works based on the physical
principle of infrared absorption. The
innovative double compensated and nonfocussing
optics effectively compensates
all temperature and ageing effects.
its many field proved components it sets
the standard for all relevant measurement
requirements. It is approved by certification
that Drager Polytron IR can be used for
SIL 2 (safety integrity level) safety
New is the configurable measuring range
for the Drager Polytron IR transmitter:
Type 334 offers 0 to 20 %LEL and up to
100 %LEL, alternatively 0 to 100 %v/v for
methane. Type 340 is configurable from
5 to 100 %LEL. Configuration is menu
guided and easy to perform, using a
HART handheld terminal or laptop.
For the easy calibration of the Drager
Polytron IR, only one gas needs to be
selected from an internal list, and this gas
can differ from the gas to be measured.
All data will be converted automatically to
the substance to be monitored.
intricate use of factors for cross sensitivity
is no longer necessary. Thus for all Drager
Polytron IR transmitters there is only one
calibration gas required, independent of the
(preventive maintenance function)
Using a preventive maintenance function –
stand-by mode – the Drager Polytron IR
transmitter does not immediately shutdown
in case of dirty optics. Prior to providing a
beam block failure signal, there will be a
warning transmitted to the control unit.
measurement continues in the background,
and it will be switched back to normal
operation when measuring gas concentrations
of more than 15 %LEL. Alarming in a
hazardous situation and with it the complete
safety functionality will be maintained.
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