11Chapter 3 Overview
Searchline Excel™ Plus / Searchline Excel™ Edge – Technical Manual
3.3Applications
Searchline Excel Plus & Searchline Excel Edge fulfil the requirement for long maintenance cycles with advanced
diagnostics and EN16508 certification supporting this approach.
Searchline Excel Plus addresses wide range of safety applications in industries including:
• Oilfield exploration
• Offshore production platforms & vessels (FPSO’s)
• Downstream oilfield processing plants
• Gas transport and pipelines
• Large storage areas & buildings
• Petro-chemical plants like refineries
• Power generation
Searchline Excel Edge delivers long range flammable gas perimeter monitoring even in harsh conditions. This fence-line
monitoring helps customers to deliver due diligence in emissions control. Application areas include:
• Refineries
• Processing Plants
• Chemical Plants
• Tank farms
• Power plants
3.4Safety Case
Searchline Excel Plus & Searchline Excel Edge provide a credible Safety Case with aim to help facilities protect people, plant
and the environment. The instruments detects a broad range of gases with a tight response curve. The advised Safety Case
is driven by the units of detection as follows:
Flammable Gases
The Safety Case for a flammable gas release is driven by explosive threat and flammable threat. For flammable gases,
the advised Safety Case level is set as A1/A2, determined by LEL.m.
Toxic Gases
The Safety Case for a toxic gas release is driven by exposure level and time (Toxicity). For toxic gases, the advised Safety
Case level is set as A1/A2, determined by ppm.m.
3.5Environmental Factors
Searchline Excel Plus & Searchline Excel Edge employ third generation advanced optics and detection to make these
Open Path Flammable Hydrocarbon Gas Leak Detectors some of the most effective available and so continue online in
demanding weather, such as heavy rain, snow and thick fog. These open path flammable gas detectors will continue to
provide safety coverage long after dense fog has rendered some other NDIR or laser-based products offline.
As with all such instruments, performance and reliability may be adversely affected by poor installation, vibration, intense
heat, sources of heavy contamination, blizzards, ice, exceptionally thick fog, deluge and flooding, subsidence, accidental
impact and intense electromagnetic fields. Care should be taken in installation and use to avoid or minimize these risks.
3.6 Searchline Excel Plus - Medium Range Safety Open Path Flammable Hydrocarbon
Gas Detector
Searchline Excel Plus is a third generation Open Path Flammable Hydrocarbon Gas Leak Detector for first line flammable
gas safety instrumented applications. Best practice suggests that this be combined with Point Flammable Gas Leak
Detectors (such as Searchpoint Optima) and Ultrasonic Gas Leak Detectors (such as Searchzone Sonik) as required by
the specific application and site Safety Case.
Searchline Excel Plus delivers improved functionality/uptime by virtue of advanced optical components, design and
diagnostics, including alignment quality. Searchline Excel Plus is part of the new Honeywell Fixed Fire and Gas Platform
with universal mount, Ex de wiring compartment and Bluetooth access. This means that Searchline Excel Plus is easier to
install and set-up correctly and that maintenance cycles can be extended.
Searchline Excel Plus has global Hazloc certification, Marine certification, Performance and Safety Instrumented
Certification.
Searchline Excel Plus will remain online in weather conditions that give poor visibility, long after some other Open Path Gas
Detector technologies have ceased to function.
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