The Drager PIR 7000 is an explosion proof point infrared gas
detector for continuous monitoring of flammable gases and
vapours. With its stainless steel SS 316L enclosure and driftfree
optics this detector is built for the harshest industrial
environments, e.g. offshore installations.
Two models of the Drager PIR 7000 are
available – type 334 and type 340. Each
model works with a different measuring
wavelength, thus giving the broadest
possible range of detectable substances
with superior accuracy.
Advanced signal stability
Following the success of the most stable
point infrared gas detector worldwide –
the Drager Polytron IR – Drager now
introduce the Drager PIR 7000 which
encompasses the latest in revolutionary
Based on patented innovations, the
Drager PIR 7000 combines a maximum
light collecting construction with a
4-beam signal stabilising system. The
total optical system uses no light beam
split, simply a set of various reflectors.
This double-compensating optical system
is very resistant towards known
influences such as dust, fog or insects
frequently found in the measuring cuvette
or by dirt accumulation on the optical
surfaces. Due to its non-imaging
construction, the measuring signal is not
affected by a partial beam block.
This innovative optical system ensures
that the Drager PIR 7000 fulfils the
customer requirements of “no false
alarms”, longer service intervals and a
drift-free signal output.
Equally important is being informed
about a potential hazard as early as
possible. An early and reliable gas alarm
allows for safety measures to be initiated
To support this, the Drager PIR 7000
offers a configurable response mode
which allows the end user to choose
between “normal” or “high speed”
response subject to the application.
Using the “high speed” option, and
combining it with the lowest feasible
alarm threshold, the Drager PIR 7000
shortens the reaction time in case of an
alarm. Leakages can be detected at the
earliest stage of their existence.
Multiple configuration capabilities
The Drager PIR 7000 is delivered with
the optimum default settings, but remains
fully flexible to meet with the customers
demands on an application-by-application
Whether it be reduced measuring
ranges, configurable special signals
(fault, beam block warning, maintenance),
adjustable LEL values (values which are
different across regions) all coupled with
the configurable gas library (for other
substances to be monitored) – all these
features of the Drager PIR 7000 offer the
possibility to set up every device exactly
to the customer’s needs and preferences.
Maximum reliability – SIL 2 certified
After almost two decades of experience
with infrared technology, leading to a
continuously enhanced product quality,
the Drager PIR 7000 is further advanced
as the total product has been developed
inline with the Functional Safety standard
EN 61508. This is applicable to both the
devices hardware and software.
Furthermore, the excellent parameters as
detailed in the SIL 2 (Safety Integrity
Level) certificate, issued by the German
TÜV show that only 2 % from the entire
SIL 2 budget is allocated to the field
device, thus providing flexibility to choose
control systems and actuators.
This is a new understanding of reliability
– not only fulfilling but exceeding the
SIL 2 requirements significantly.