Fiber Sensing
Distributed Acoustic Sensing
DAS · intrusion & leak detection
160 km (dual channel)±2 m localization
Third-party intrusion and leak detection for oil & gas and power assets.
View DAS systemDistributed Fiber Optic Sensing Products
Fully in-house engineered optical path, structure and demodulation algorithms — covering vibration, temperature, strain and cable health across four sensing dimensions.
Overview
What is distributed fiber optic sensing?
Distributed fiber optic sensing (DFOS) turns a standard optical fiber into a continuous sensor array, measuring vibration, temperature, strain or fiber health at every point along the cable. Because the fiber itself is the sensor, a single interrogator covers route-kilometers of linear asset with no field power or electronics along the line — which is why DFOS is used to protect pipelines, power cables, tunnels, railways, conveyors and communication networks. Landsub Global is a distributed fiber optic sensing infrastructure provider: the optical path, mechanical design and demodulation algorithms of every product on this page are engineered fully in-house, with AI pattern recognition where alarms must be trustworthy.
Portfolio
The product portfolio at a glance: acoustic, temperature, strain and detection
| Product | Sensing dimension | Primary assets | Key figures |
|---|---|---|---|
| DAS | Acoustic / vibration | Pipelines, railways, conveyors, perimeters | 160 km (dual channel) · ±2 m · 0.03 rad/√Hz |
| DTS | Temperature | Power cables, tunnels, conveyors | ±0.5 °C · 0.8 m · 30 km SM / 20 km MM per channel |
| DTSS-BOTDR | Strain + temperature | Tunnels, bridges, slopes, foundations | ±5 με · 8000 με · ≤1 s |
| RFTS cable monitor | Fiber health | Telecom, power, plant fiber routes | 100 km · ±1 m · 7×24 in-service |
| AI Sentry™ | AI upgrade layer | Existing DAS/DVS installations | DAS ≥95% · DVS ≥90% · no hardware change |
| Pig tracking | Acoustic (service) | Pipelines under inline inspection | 3000+ km tracked · real-time position & speed |
Fiber Sensing
Distributed Temperature Sensing
DTS · linear asset temperature
±0.5°C accuracy0.8 m resolution
Fire early-warning and temperature monitoring for power cables.
View DTS system
Fiber Sensing
Distributed Strain & Temperature
DTSS-BOTDR · structural health
±5με strain≤1 s measurement
Structural health monitoring for tunnels, bridges and infrastructure.
View DTSS-BOTDR system
Fiber Sensing
Fiber Optic Cable Monitor
Cable health monitoring
100 km range±1 m fault location
Online cable health management and sub-second fault localization.
View cable monitor
Specialized Service
AI Sentry™ DAS/DVS Upgrade
Retrofit existing systems
DAS ≥95%DVS ≥90%
Inject in-house AI into existing DAS/DVS systems without replacing hardware.
View AI upgrade
Specialized Service
Pipeline Pig Tracking
Inline inspection tracking
All pig types3000+ km tracked
Real-time tracking of pigs and inline inspection tools.
View pig tracking
Selection
How to choose the right monitoring system
Selection starts from the physical quantity that matters for your risk, then from the asset's existing infrastructure.
- Protecting against third-party activity or leaks? → DAS acoustic sensing, with AI classification if alarm quality is the concern.
- Managing heat or fire risk? → DTS temperature monitoring on cables, tunnels and conveyors.
- Tracking structural deformation? → DTSS-BOTDR distributed strain and temperature on tunnels, bridges and slopes.
- Fiber routes going down without warning? → the RFTS cable monitor for in-service fiber health and ±1 m fault location.
- Already have DAS/DVS but drowning in false alarms? → AI Sentry™ upgrade without replacing hardware.
- Running a pigging or ILI campaign? → the pig tracking service for real-time position and stuck-pig localization.
If the asset already has a fiber optic cable along its route, most systems above can run on a spare core — a good first step is a short-term monitoring engagement on your own route before any permanent commitment.
Industries
Where these systems are used: long-distance pipeline to conveyor lines
- Oil & gas pipelines: third-party intrusion and leak detection on long-haul routes, including field-proven deployments on high-sulfur gas pipelines and a CCUS CO₂ pipeline.
- Power & energy: cable fire early-warning with DTS, corridor intrusion monitoring with DAS, and in-service fiber management with RFTS.
- Transportation: rail intrusion and slope monitoring, tunnel structural health, and communication cable supervision along rail and highway networks.
- Mining & ports: conveyor roller and fire monitoring across long material-handling lines.
- Telecom operators: continuous cable-health management and precise fault localization across fiber routes.
Engineering
One engineering platform behind every measurement, not a reseller catalog
Every product listed here is engineered in-house — optical path, mechanical design and demodulation algorithms — so specifications stay consistent between datasheet and field behavior, and upgrades such as AI Sentry™ are developed against the same platform rather than bolted on. The product line is certified across the quality, environmental, occupational health, information security and IT service management standards, with CE marking covering the full range.
In practical terms, single-platform engineering shows up in three places. Interrogator families share station-end interfaces, so a corridor that starts with DAS can add a DTS or RFTS dimension without a new integration project. Alarm outputs share a common event model, so control-room workflows stay stable as sensing dimensions are added. And field calibration methods are consistent, so the acceptance discipline used on one route transfers to the next. For buyers, that means the second system on a network is a configuration exercise, not a new procurement learning curve.
Deployment
From selection to installation: how an engagement runs
Once the sensing dimension is chosen, every product engagement follows the same survey-first path:
- Step 1 — Route and asset review. The asset route, existing fiber and duct resources, and the event or thermal risk profile are reviewed with your engineering team.
- Step 2 — Configuration proposal. The right interrogator model, channel plan and sensing-cable layout are proposed against the measured route — not a generic kit.
- Step 3 — Installation and commissioning. Units are installed at station ends, the optical path is commissioned, and baselines are recorded on the actual asset.
- Step 4 — Alarm calibration and handover. Thresholds and AI event models are tuned to site signatures, and control-room teams are trained before go-live.
- Step 5 — Operations support. Alarm review, model updates and system health checks continue for the life of the installation.
FAQ
Frequently asked questions
When is DAS the right choice?
Choose DAS when the risk is mechanical or human activity along a linear asset: third-party intrusion and leak detection on pipelines, rail and slope events, conveyor roller faults and perimeter breaches. One DAS interrogator listens along up to 160 km of fiber in dual-channel configuration (86 km single-channel applications), localizes events to ±2 m with 0.03 rad/√Hz sensitivity, and pairs with AI pattern recognition — in-house recognition accuracy ≥95% on DAS — when alarm quality matters.
When is DTS the right choice?
Choose DTS when the risk is heat: power cable fire early-warning, tunnel and conveyor temperature monitoring, and hot-spot tracking on any linear asset. DTS resolves temperature to ±0.5 °C with 0.8 m spatial resolution, and one channel covers 30 km on single-mode fiber or 20 km on multimode — so an entire cable corridor is monitored continuously from one station end, with no field electronics.
When are DTSS-BOTDR and RFTS the right choice?
Choose DTSS-BOTDR when structures deform slowly and quietly — tunnels, bridges, slopes and foundations — where it resolves strain to ±5 με across an 8000 με range with measurements in ≤1 s. Choose the RFTS fiber monitor when the asset is the fiber itself: it watches live communication cables in service across 100 km, pinpoints faults to ±1 m and keeps the route under 7×24 automatic supervision.
Learn More
Further reading
- Fiber optic sensor — the technology family spanning every product on this page.
- Distributed acoustic sensing — background on DAS vibration and acoustic event detection.
- Distributed temperature sensing — background on DTS continuous temperature measurement.
- Optical time-domain reflectometer — the measurement basis of the RFTS cable monitor.
Not sure which system fits your scenario?
Tell us your asset type and monitoring distance — we'll recommend the right configuration.
Last updated: September 2026
By the Landsub Global Engineering Team