Executive Summary & Core Capabilities
The Honeywell Searchline Excel is the industry-standard open path infrared gas detection system designed to monitor combustible hydrocarbon vapors across open distances. While point gas detectors protect localized equipment nodes, open path detectors create a line-of-sight optical barrier that intercepts migrating gas clouds along facility boundaries, jetties, and marine port transfer zones.
Constructed from heavy-duty 316 stainless steel with IP66/IP67 ingress sealing, the Searchline Excel system comprises a specialized Transmitter and Receiver pair. It provides continuous path-integrated concentration measurement up to 5 LEL.m, reacting to combustible gas leaks in under 3 seconds.
- Wide Boundary Protection: Monitors up to 200 meters in a single straight line, replacing dozens of individual point gas detectors along fence lines and loading docks.
- 100% Solar & Environmentally Immune: Advanced optical filtering prevents blinding or false alarms from direct sunlight, flare stack reflection, arc welding, or heavy marine fog.
- High-Speed Alarm Warning: Triggers safety systems within 3 seconds of gas plume detection, giving site operators time to initiate automated emergency shutoffs.
- All-Weather Reliability: Integrated window heating keeps optical lenses clear of ice, frost, and sea spray condensation in severe arctic or coastal environments.
The Searchline Excel optical engine employs a coaxial optical design paired with a patented double band pass filter system. Standard open path gas monitors use two spectral channels (active and reference), which are vulnerable to differential light scattering caused by rain droplets or fog.
By utilizing double band pass filters, Searchline Excel measures baseline sample radiation alongside dual reference bands. This cancels out differential optical scattering from fog and atmospheric moisture, ensuring accurate path-integrated readings even under severe partial beam obscuration.
Technical Specifications & Performance Matrix
| Metrology Parameter | Engineering Specification |
|---|---|
| Detection Technique | Open Path Infrared Absorption Spectroscopy |
| Measuring Range | (Path Integrated Concentration) |
| Short Range Path Length | () |
| Medium Range Path Length | () |
| Long Range Path Length | () |
| Speed of Response | (under normal conditions) |
| Interface Component | Technical Profile |
|---|---|
| Analog Output Signal | (Autosensing Sink or Source) |
| Diagnostic Signal Currents | (Fault), (Beam Blocked), (Dirty Optics) |
| Digital Signaling | Modbus RS485 multi-drop (via DX100/XNX transmitter) |
| Power Input Voltage | |
| Power Consumption | Tx: max; Rx: max |
| Compliance Metric | Specification |
|---|---|
| Enclosure Metallurgy | 316 Stainless Steel |
| Ingress Enclosure Rating | IP66 / IP67 |
| Operating Temperature | () |
| Functional Safety Rating | IEC 61508 SIL 2 certified |
| Hazardous Area Approvals | ATEX, IECEx, UL, CSA, FM Class 1 Div 1 |
Target Industry Applications
Maritime & Port Loading Boundaries
Maps fugitive flammable gas plume pathways along ship-to-shore loading lines, LNG jetty barriers, and marine transfer manifolds.
Refinery Perimeter Security
Forms a non-intrusive boundary shield around storage tank farms, gas processing plants, and boundary fence lines prone to airborne gas migration.
Official Provider Resources & In-Depth Documentation
For complete technical handbooks, safety system integration guides, and direct support from Honeywell's engineering team, explore the official manufacturer portals below:
