Field Verified
PetroChina high-sulfur gas pipeline
Replaced a leading global vendor after a multi-vendor field trial; 100% event recognition accuracy.
100%
Recognition accuracy (test)
Pipeline Third-Party Intrusion & Leak Detection (DAS)
One fiber becomes tens of thousands of acoustic sensors — 160 km (dual channel) with industry-leading simultaneous listening points, delivering 24/7 third-party intrusion and leak early-warning for linear assets.
Specifications
Key specifications — benchmarked against leading international vendors
| Specification | Leading international vendors* | LandSub Global |
|---|---|---|
| Monitoring range | 100 km (dual channel) | 160 km (dual channel) |
| Localization accuracy | 1–5 m (spatial resolution) | ±2 m |
| Sampling frequency | 1–20 kHz | 0.1 Hz – 20 kHz |
| Detection sensitivity | Not publicly disclosed | 0.03 rad/√Hz |
*Based on publicly available specifications of leading international DFOS vendors, as of Aug 2026.
Highlights
Technology highlights
Ultra-long single channel
86 km per channel reduces repeaters and host placement, lowering total cost of ownership for long-haul pipelines.
AI recognition
In-house acoustic AI classifies excavators, farming machinery and manual activity with 99.32% objective accuracy in field evaluation.
Field-proven replacement
Replaced a leading global vendor after a multi-vendor field trial on a high-sulfur gas pipeline — 100% on-site recognition accuracy.
Applications
Applications — hear it before it happens
Third-party intrusion
Real-time warning and precise localization of mechanical excavation and manual digging.
Pipeline leak detection
Leak acoustic signature recognition with second-level response.
Conveyor roller monitoring
Acoustic fault early-warning for mining and port conveyor rollers.
Rail intrusion & slope
Online monitoring of rail intrusion, slope movement and rockfall.
Related Cases
Proven by field projects
Long-haul Pipeline
National operator — China-Myanmar line
59.14 km gas spur line; excavator 25 m, farming 5 m, manual 2 m alarm ranges.
95%
Effective alarm rate
CCUS
PetroChina CCUS CO₂ pipeline
First CCUS CO₂ long-haul pipeline third-party intrusion and leak early-warning system.
1st
CCUS CO₂ pipeline application
FAQ
Frequently asked questions
DAS uses Φ-OTDR and Rayleigh backscattering to turn a whole cable into a continuous acoustic sensor array, monitoring vibration and acoustic events in real time. LandSub Global's DAS reaches 86 km per channel with industry-leading simultaneous listening points.
When excavation occurs along a pipeline, vibration travels through soil to the co-located cable; the DAS unit demodulates it in real time and AI classifies the event and threat level, issuing an alarm with meter-level localization within seconds. Field projects have verified effective alarm rates above 95%.
Usually not. Linear assets often already have co-located communication cables; DAS can use a spare fiber core. Sensing-communication fusion lets a single core carry both communication and sensing.
Get a DAS configuration and quote
Tell us your pipeline length and scenario — we'll provide a tailored recommendation.