The Hertzinno HZ-iDAS Series is a next-generation distributed sensing platform that utilizes standard optical fiber as a high-sensitivity acoustic and vibration sensor. Based on advanced optical phase monitoring technology, the system achieves long-distance detection with high spatial resolution and intrinsic safety.

By analyzing the phase changes in backscattered light, the HZ-iDAS provides an end-to-end monitoring solution for critical infrastructure, offering rich measurement information and automated pattern recognition to distinguish between environmental noise and genuine threats.

Detection Distance

20 km

Spatial Resolution

10 m

Bandwidth

5 kHz

Min. Frequency

0.1 Hz

Channels

1CH / 2CH

Fiber Interface

FC/APC

Product Summary

HZ-iDAS Series provides distributed acoustic and vibration monitoring along optical fiber routes. Unlike point sensors, one sensing fiber can cover long-distance assets and detect events continuously along the full route. By analyzing Rayleigh backscattered phase changes, time-domain signals, frequency-domain features and spatial patterns, HZ-iDAS helps operators locate and classify abnormal vibration or acoustic events in real time.

5 km / 20 km / 50 km

Flexible DAS monitoring distance options for different project scales.

0.1 Hz Minimum Frequency

Detect low-frequency vibration events and long-duration disturbance signals.

Up to 20 kHz Bandwidth

High-bandwidth configuration for short-distance detailed acoustic monitoring.

1CH / 2CH

Flexible channel configuration for single-route or dual-route sensing.

Why DAS Matters

Turn one optical fiber into a long-distance acoustic and vibration sensor.

Distributed acoustic sensing helps operators monitor pipelines, perimeters, conveyor belts and critical infrastructure routes without installing thousands of point sensors. By analyzing vibration and acoustic events along the fiber, HZ-iDAS provides continuous route monitoring, event localization and intelligent pattern recognition.

Continuous monitoring along the full fiber route.

HZ-iDAS uses optical fiber as a distributed sensor. Vibration, digging, intrusion or abnormal mechanical sound can be detected and mapped to a distance location along the route.

5–50 km Model-dependent monitoring distance

0.1 Hz Minimum detection frequency

1CH / 2CH Flexible sensing routes

0 km Pipeline Perimeter 50 km

Continuous Route Monitoring

A single sensing fiber provides distributed acoustic and vibration monitoring along pipelines, fences, cable routes or conveyor systems.

Precise Event Localization

OTDR-based positioning maps vibration or acoustic events to a distance location, helping operators respond faster.

Intelligent Pattern Recognition

DAS data can be analyzed to identify digging, vehicles, manual activity, perimeter intrusion and mechanical abnormal sound.

Passive & Intrinsically Safe

The sensing fiber requires no field power, making it suitable for long-distance, high-voltage, harsh and hazardous environments.

DAS Monitoring Principle

Rayleigh backscatter and phase demodulation for acoustic sensing

HZ-iDAS sends laser pulses into the sensing fiber and analyzes the returned Rayleigh backscattered light. When vibration, sound pressure or external disturbance acts on the fiber, it changes the fiber length, refractive index and optical phase. By demodulating phase changes and using OTDR time-of-flight positioning, the system determines both the event type and its location along the fiber.

Vibration changes optical phase. OTDR gives the position.

DAS does not rely on point microphones or electrical sensors along the route. The optical fiber itself becomes a distributed acoustic sensor. External vibration modulates the phase of Rayleigh backscatter, while the return time tells where the event occurred.

DAS sensing logic Event signal = Rayleigh backscatter phase change. Location = optical return time through OTDR positioning.

Rayleigh Backscatter signal source

Phase Changed by vibration

OTDR Distance localization

AI Event classification

Phase demodulation Vibration causes optical phase changes in Rayleigh backscatter.

OTDR localization Return time maps the phase change to a distance location.

Laser Pulse

The DAS analyzer launches optical pulses into the sensing fiber along the monitored route.

Rayleigh Backscatter

Weak Rayleigh backscattered signals return from each section of the optical fiber.

Phase Modulation

Vibration or sound pressure changes the optical phase of the backscattered signal.

Event Localization

OTDR timing and signal analysis locate the event and support pattern recognition.

Application Scenarios

Where HZ-iDAS distributed acoustic sensing is used

HZ-iDAS is designed for long-distance acoustic and vibration monitoring where traditional point sensors are difficult to deploy. A single sensing fiber can monitor pipelines, perimeters, conveyor belts, cable routes and critical infrastructure for intrusion, digging, leakage-related vibration and mechanical abnormal sounds.

Pipeline Security

Pipeline Intrusion & Third-party Interference

Detect mechanical digging, manual digging, vehicle passing and construction activity along oil, gas and utility pipelines.

Excavator and drilling activity
Manual digging and impact events
Vehicle movement near pipelines

Leak-related Acoustic

Pipeline Abnormal Event Monitoring

Monitor vibration and acoustic patterns related to leakage, abnormal flow, external damage and pipeline operating changes.

Leakage-related vibration signals
Flow disturbance analysis
External damage warning

Perimeter Security

Fence, Border & Site Intrusion Detection

Use fiber optic sensing along fences, industrial parks, restricted areas and borders to detect intrusion and disturbance events.

Walking and climbing events
Fence cutting or disturbance
Remote unmanned site protection

Conveyor Belt

Conveyor Roller Abnormal Sound Monitoring

Analyze roller abnormal sound, bearing noise, friction and mechanical vibration along conveyor belt systems.

Roller abnormal sound detection
Bearing and friction fault warning
Fault location along the belt route

Cable Route

Cable Corridor Disturbance Monitoring

Monitor cable corridors, power transmission routes and utility tunnels for digging, construction activity or external interference.

Construction disturbance detection
Vibration event localization
Power route security monitoring

Infrastructure

Critical Infrastructure Protection

Apply distributed vibration sensing to railways, roads, bridges, tunnels, large structures and remote infrastructure routes.

Long-distance asset monitoring
Vibration and acoustic event analysis
Integration with monitoring platforms

Intelligent Event Recognition

From distributed vibration signals to event classification

HZ-iDAS analyzes phase, time-domain, frequency-domain and spatial signal patterns along the sensing fiber. Combined with machine learning algorithms, the system can classify typical events such as mechanical digging, manual digging, vehicle movement, perimeter intrusion, conveyor roller abnormal sound and pipeline abnormal vibration.

More than alarm detection — HZ-iDAS identifies what happened.

Raw DAS data contains vibration intensity, frequency components, spatial position and time evolution. HZ-iDAS converts these signals into event features, then uses intelligent recognition models to reduce false alarms and support faster response.

Signal Capture Distributed fiber records vibration and acoustic changes along the route.

Feature Extraction Time-domain, frequency-domain, spatial-domain and waterfall features are extracted.

Pattern Recognition Machine learning compares event signatures with trained models.

Alarm & Response The system outputs event type, location, time and alarm status for operators.

Real-time DAS phase signal Live feature extraction

Time Domain Impact rhythm and vibration duration.

Frequency Domain Energy distribution and spectrum type.

Spatial Pattern Event position and route behavior.

Mechanical Digging Excavator / drilling pattern

Manual Digging Pickaxe / repeated impact

Vehicle Passing Moving vibration signature

Perimeter Intrusion Walking / climbing / cutting

Roller Abnormal Sound Conveyor bearing fault signal

Pipeline Abnormal Event Leakage-related vibration

Phase Signal Analysis

Real-time phase demodulation helps detect vibration changes at each position along the fiber.

Spectrum Analysis

Frequency-domain analysis helps distinguish event types with different vibration characteristics.

Waterfall Visualization

Spatial-temporal display shows where and when events occur along the entire sensing route.

AI Event Classification

Machine learning models help classify digging, vehicles, intrusion and mechanical abnormal sound.

Model Comparison

Compare HZ-iDAS10, HZ-iDAS20 and HZ-iDAS50

Choose the right HZ-iDAS model according to monitoring distance, spatial resolution, bandwidth and event type. HZ-iDAS10 is suitable for high-bandwidth short-distance monitoring, HZ-iDAS20 is balanced for medium-distance pipeline and perimeter projects, while HZ-iDAS50 is designed for long-distance infrastructure monitoring.

High Bandwidth

HZ-iDAS10

Short-distance DAS model for detailed vibration and acoustic monitoring where higher bandwidth and better spatial resolution are required.

5 km Detection distance

5 m Spatial resolution

20 kHz Bandwidth

0.1 Hz Minimum frequency

Balanced Choice

HZ-iDAS20

Medium-distance DAS model for pipeline security, perimeter monitoring, utility corridors and typical third-party interference detection.

20 km Detection distance

10 m Spatial resolution

5 kHz Bandwidth

0.1 Hz Minimum frequency

Long Distance

HZ-iDAS50

Long-distance DAS model for extended pipelines, transportation corridors, large perimeters and remote critical infrastructure routes.

50 km Detection distance

10 m Spatial resolution

1 kHz Bandwidth

0.1 Hz Minimum frequency

Item	HZ-iDAS10	HZ-iDAS20	HZ-iDAS50
Positioning	High-bandwidth short-distance DAS	Balanced medium-distance DAS	Long-distance infrastructure DAS
Detection Distance	5 km	20 km	50 km
Spatial Resolution	5 m	10 m	10 m
Bandwidth	20 kHz	5 kHz	1 kHz
Minimum Detection Frequency	0.1 Hz	0.1 Hz	0.1 Hz
Fiber Loss	0.3 dB/km	0.3 dB/km	0.3 dB/km
Channels	1CH / 2CH	1CH / 2CH	1CH / 2CH
Laser Class	Class 1	Class 1	Class 1
Optical Fiber Interface	FC/APC	FC/APC	FC/APC
Communication	1000M Ethernet	1000M Ethernet	1000M Ethernet
Power Supply	AC220V; 110VAC optional	AC220V; 110VAC optional	AC220V; 110VAC optional
Best For	Perimeter, conveyor belt, short pipeline and high-frequency acoustic monitoring	Pipeline security, utility corridor, perimeter and third-party interference detection	Long-distance pipeline, large perimeter, transportation corridor and remote infrastructure monitoring

Note: Final model selection should consider route length, fiber quality, event type, required bandwidth, installation environment and software algorithm configuration.

Download

HZ-iDAS Distributed Acoustic Sensing FAQ

Common questions about distributed acoustic sensing, fiber optic vibration monitoring, pipeline intrusion detection, perimeter security and conveyor belt acoustic monitoring.

What is HZ-iDAS used for?

HZ-iDAS is used for long-distance distributed acoustic and vibration monitoring. Typical applications include pipeline security, third-party intrusion detection, perimeter protection, conveyor belt roller monitoring, cable route disturbance monitoring and critical infrastructure protection.

What is the difference between DAS and DTS?

DAS detects acoustic and vibration events based on Rayleigh backscatter phase changes, while DTS measures temperature based on Raman scattering. DAS is used for intrusion, digging, vibration and acoustic event detection; DTS is used for temperature, hotspot and fire risk monitoring.

Which model should I choose?

Choose HZ-iDAS10 for short-distance high-bandwidth monitoring, HZ-iDAS20 for medium-distance pipeline or perimeter monitoring, and HZ-iDAS50 for long-distance infrastructure monitoring.

Can HZ-iDAS detect pipeline third-party interference?

Yes. HZ-iDAS can detect and classify mechanical digging, manual digging, vehicle passing and other external interference events along pipeline routes.

Can HZ-iDAS be used for conveyor belts?

Yes. DAS can monitor abnormal sound and vibration from conveyor belt rollers, bearings and mechanical components, helping locate fault points and support predictive maintenance.

Can the system restore sound at a selected point?

Yes. The software can monitor the time-domain sound signal at a selected fiber position and support sound restoration for event verification and analysis.

Plan your distributed acoustic sensing system.

Tell us your asset type, monitoring distance, fiber route, target events, required bandwidth and integration requirements. HERTZINNO will help you choose the right HZ-iDAS model and monitoring configuration.

Request DAS Solution

PRODUCTS: Acoustic Imaging Cameras; Acoustic Fingerprint Solutions; Fiber Optic Sensing

Contact Us: Greenland Mtown, No. 515, Huanke Road, Pudong District, Shanghai, China; info@hertzinno.com

LATEST NEWS: Subscribe to access product market trends, priority quotation services and trade cooperation updates.

Follow Us

We use Cookie to improve your online experience. By continuing browsing this website, we assume you agree our use of Cookie.

HZ-iDAS-20

Product Summary

5 km / 20 km / 50 km

0.1 Hz Minimum Frequency

Up to 20 kHz Bandwidth

1CH / 2CH

Turn one optical fiber into a long-distance acoustic and vibration sensor.

Continuous monitoring along the full fiber route.

Continuous Route Monitoring

Precise Event Localization

Intelligent Pattern Recognition

Passive & Intrinsically Safe

Rayleigh backscatter and phase demodulation for acoustic sensing

Vibration changes optical phase. OTDR gives the position.

Laser Pulse

Rayleigh Backscatter

Phase Modulation

Event Localization

Where HZ-iDAS distributed acoustic sensing is used

Pipeline Intrusion & Third-party Interference

Pipeline Abnormal Event Monitoring

Fence, Border & Site Intrusion Detection

Conveyor Roller Abnormal Sound Monitoring

Cable Corridor Disturbance Monitoring

Critical Infrastructure Protection

Need to match DAS to a specific route or asset?

From distributed vibration signals to event classification

More than alarm detection — HZ-iDAS identifies what happened.

Phase Signal Analysis

Spectrum Analysis

Waterfall Visualization

AI Event Classification

Compare HZ-iDAS10, HZ-iDAS20 and HZ-iDAS50

HZ-iDAS10

HZ-iDAS20

HZ-iDAS50

Download

HZ-iDAS Distributed Acoustic Sensing FAQ

What is HZ-iDAS used for?

What is the difference between DAS and DTS?

Which model should I choose?

Can HZ-iDAS detect pipeline third-party interference?

Can HZ-iDAS be used for conveyor belts?

Can the system restore sound at a selected point?

Plan your distributed acoustic sensing system.