The Searchline Excel is the world’s
best selling infrared open path gas
detector with over 6,000 units installed
in challenging applications throughout
industry. From the Arctic Circle to
Middle Eastern Deserts, customers have
repeatedly selected the Searchline Excel
as their preferred choice.
The fundamental design of Searchline
Excel has remained the same since its
original launch and it continues to lead
the field. Other manufacturers have tried
unsuccessfully to develop comparable
instruments but none have the experience or
technology that is utilized in Searchline Excel.
Being in this dominant position has not meant
that we have neglected our close relationships
with key users. In fact, we have been listening
carefully and working together with them to
make the best even better! As a direct result
of customer feedback Searchline Excel is even
easier to align and has the option of an industry
standard MODBUS digital output.
Searchline Excel is totally immune
to interference from sunlight or any other
sources of radiation such as flare stacks,
arc welding or lightning.
This is achieved by using a xenon flash lamp that
is actually brighter than the sun at the infrared
detection wavelengths and solid state detectors
with a wide dynamic range.
The lamp is also modulated to have a unique
pulse duration and shape. The receiver then uses
high speed digital signal processing to validate
that all the signals received have this unique
signature and rejects any extraneous signals
Why open path gas detection?
Open path detectors compliment the use of individual
point detectors and offer many significant benefits
including:
- Wider area coverage - most likely to pick up any leak
- Very high speed of response
- NO unrevealed failure modes - no possibility of
blocked gas path to detector
- Detector location not as critical
- Indicates size of hazard
The multi drop Modbus capability can
enable significant savings in installation and
cabling costs. A single comms cable can
be run between up to 32 detectors instead
of the usual ‘home run’ required for each
detector. Additionally, the 2 way digital
communication protocol allows configuration,
warning and fault diagnosis information to be
communicated back to the control room. This
reduces servicing and maintenance costs as
the operator can diagnose the state of any
individual unit before deciding to send anyone
into the field.
Based on the proven open path
design, Searchline Excel Cross-Duct
was developed in response to the unique
requirements for monitoring in HVAC
ducting and Turbine Enclosures.
The Difference
The patented optical design used in Searchline
Excel has proven itself as the only solution
available that fully addresses all the challenges
of open path gas detection. Unlike some
competitive devices, it does not try to hide
fundamental design inadequacy with the use
of software masks that can compromise the
unit’s ability to detect gas. Searchline Excel
employs a patented double band pass filter
that fully compensates for all types of fog and/
or rain thereby allowing it to continue operate
accurately and reliably in all climatic conditions.
Applications
- Offshore platforms & vessels (FPSO’s)
- Downstream chemical processing plants
- Gas transport and pipelines
- Large storage areas & buildings
Features & benefits
- Fast speed of response
provides earliest warning
- High sensitivity allows low alarm set points
- Alignment free design makes
installation simple
- Duct flex and vibration tolerance
keeps the system online
- Integral functional gas test facility allows
for simple system check
- Contamination resistant optics
reduce the need
for unscheduled maintenance
- Not affected by interference
from water vapour
- Immune to catalytic poisons
- Works in inert atmospheres
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