1 / 5

Product

fiber optic cable seriesSEAFOM-MSP-02 DAS1 Hz–5 kHz AcousticCST / SWA Armoured

AcoustAlert G28 Distributed Acoustic Sensing Fibre CableHigh-sensitivity phase-OTDR distributed acoustic sensing (DAS) optical cable

AcoustAlert G28 Distributed Acoustic Sensing Fibre Cable engineered for coherent Rayleigh phase-OTDR (Φ-OTDR) acoustic, seismic and vibration detection along pipelines, railways, borders and subsea/buried power corridors.

Direct Trench Burial
FIMT / Acoustic Gel
Isotropic Acoustic Coupling
SEAFOM-MSP-02 DAS
Order designation
G28-CST-06SM
Outer Ø ≈
9.0 mm
Weight ≈
95 kg/km
Max. pull load
2,500 N
Crush rating
3,000 N/100mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Fibre grade
G.652.D / G.657
Low-Rayleigh-noise DAS single-mode
Acoustic band
0.5 Hz to 5 kHz
Seismic, footstep & leak frequencies
Fibre count
4 to 24 fibres
DAS SM + optional DTS OM3 cores
Tensile rating
2,500–6,500 N
CST or SWA direct-burial armour
Crush rating
3,000–6,000 N
per 100 mm radial compression
Temperature
-40 to +75 °C
Continuous buried/duct operation

Typical values for this cable type, based on IEC 60794-1-21 / SEAFOM-MSP-02 / ITU-T G.652.D — confirmed in the datasheet and quotation for your order.

Application fit

Is AcoustAlert G28 right for your machine?

Tuned for high radial-to-axial acoustic strain transfer so coherent Φ-OTDR interrogators detect third-party excavation, pipeline leaks, footsteps, and train wheel defects over 40–80 km.

Fixed installation

Suitable

Direct burial in pipeline trenches, perimeter fences, railway ballast troughs, and duct banks.

TBM gantry & advancing tunnel reel

Suitable

LSZH-jacketed G28 variant monitors tunnel structural acoustic emissions and traffic incidents.

Immersion & wet locations

Suitable

Laser-welded FIMT and water-blocked acoustic gel withstand flooded ducts and saturated soil.

Energy chain / drag chain

Not suitable

Static distributed acoustic sensor cable; not for continuous flexing in cable carriers.

Use HITRONIC PCF DUPLEX
Typical machinesOil, Gas & Slurry Pipeline Leak DetectionBorder, Airport & Perimeter IntrusionRailway Track & Wheel-Flat MonitoringBuried HV Export Cable Third-Party StrikeCarbon Capture (CCS) & Microseismic Arrays

Construction

Layer by layer

AcoustAlert G28 Distributed Acoustic Sensing Fibre Cable showing acoustically coupled G.652.D/G.657.A1 single-mode fibres in an impedance-matched buffer tube, acoustic transfer bedding, metallic armour, and high-modulus HDPE/LSZH sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1DAS sensing & telemetry fibresLow-attenuation ITU-T G.652.D / G.657.A1 single-mode sensing fibres (plus optional 50/125 µm OM3 fibres for hybrid DTS)≤ 0.34 dB/km @ 1310 nm · ≤ 0.20 dB/km @ 1550 nm
2Impedance-matched acoustic buffer tubeLaser-welded 316L stainless steel FIMT or high-modulus acoustic PBT tube filled with viscosity-tuned acoustic coupling gelTransfers radial P-wave and S-wave pressure into axial fibre phase shift
3Acoustic damping & water-blocking layerContinuously extruded thermoplastic elastomer / water-swellable tape bedding eliminating air gapsPrevents internal metallic ringing and acoustic attenuation
4Tightly bonded CST or SWA armourCopolymer-bonded corrugated steel tape (G28-CST) or helically stranded galvanized steel wires (G28-SWA)3,000–6,000 N/100 mm soil crush & rodent protection
5Acoustic-coupling outer jacketHigh-density Polyethylene (HDPE) or low-smoke zero-halogen (LSZH) extruded tightly over armourHigh soil-to-cable mechanical coupling factor

AcoustAlert G28-CST

Bonded corrugated steel tape armour + HDPE sheath for pipeline ducts, fences and perimeter trenches

AcoustAlert G28-SWA

Laser-welded 316L FIMT + galvanized steel wire armour for rocky direct burial and microseismic boreholes

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60794-1-21 / SEAFOM-MSP-02 / ITU-T G.652.D. Values for your order are confirmed in the datasheet and quotation.

Electrical

Sensing principle
Coherent Rayleigh backscatter (Φ-OTDR / DAS)
Interrogator reach
Up to 50–80 km per channel @ 1550 nm
Spatial gauge resolution
1.0 m to 10 m (interrogator-configurable)

Thermal

Operating temperature
-40 °C to +75 °C
Installation temperature
-15 °C to +60 °C
Storage temperature
-40 °C to +80 °C

Mechanical

Tensile rating (G28-CST)
2,500 N installation · 1,200 N permanent
Tensile rating (G28-SWA)
6,500 N installation · 3,000 N permanent
Crush resistance
3,000 N/100 mm (CST) · 6,000 N/100 mm (SWA)
Min. bend radius
15 × OD (static) · 20 × OD (pulling)

Optical

Fibre specification
ITU-T G.652.D / G.657.A1 (+ optional OM3)
Attenuation @ 1550 nm
≤ 0.20 dB/km (optimised for long-range Φ-OTDR)
Attenuation @ 1310 nm
≤ 0.34 dB/km
Acoustic frequency response
0.5 Hz to 5,000 Hz flat radial coupling

Resistance

Water penetration
IEC 60794-1-22 Method F5B longitudinal block
Hydrostatic pressure
Up to 15 MPa (150 bar) on FIMT-SWA variant
Rodent & impact protection
Metallic CST/SWA armour (25 J impact Method E4)
Chemical & hydrocarbon
HDPE sheath resists crude oil and soil acids

Reference standards

DAS performance guide
SEAFOM-MSP-02 & IEC 61757-3-2
Cable test standard
IEC 60794-1-21 & IEC 60794-1-22
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Outer sheath colour
Black with longitudinal Blue or Yellow DAS stripe
Fibre colour code
TIA-598-D / IEC 60304 12-colour
Sheath marking
TEBAOFLEX ACOUSTALERT G28 DAS FO CABLE <COUNT>F
Customs tariff (HS)
8544.7000

Sizes

6 standard AcoustAlert G28 DAS configurations

Dimensional and mechanical parameters for AcoustAlert G28 CST and SWA distributed acoustic sensing cables.

Dimensions & mechanical ratings
Order designationSensing & spare fibresOuter Ø ≈
mm		Weight ≈
kg/km		Max. pull
N		Crush
N/100 mm		Enquiry
G28-CST Corrugated Steel Tape Armoured
G28-CST-04SM4 × G.652.D SM8.6882,5003,000
G28-CST-06SM6 × G.652.D SM9.0952,5003,000
G28-CST-12SM12 × G.652.D SM9.81123,0003,000
G28-SWA FIMT + Steel Wire Armoured
G28-SWA-04SM4 × G.652.D SM (FIMT)10.21656,0006,000
G28-SWA-06SM02MM6 × SM (DAS) + 2 × OM3 (DTS)10.61786,5006,000
G28-SWA-12SM12 × G.652.D SM (FIMT)11.21956,5006,000
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Hybrid 6SM+2MM configuration allows simultaneous Φ-OTDR acoustic intrusion detection and Raman DTS leak temperature profiling.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
1550 nm Rayleigh backscatter uniformity & OTDR testAttenuation ≤ 0.20 dB/km @ 1550 nm with uniform backscatter traceEvery manufactured drum length
Sample tests
Longitudinal water penetration (Method F5B)Zero water leakage after 24 h under 1 m water headPer production lot
Acoustic Transfer Function (ATF) sensitivity checkVerified radial acoustic phase sensitivity across 1 Hz to 5 kHzType qualification
Tensile & radial crush test (IEC 60794-1-21 E1 & E3)Up to 6,500 N pull and 6,000 N/100 mm crush with Δα ≤ 0.05 dBType qualification

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

IEC 61757-3-2 & SEAFOM-MSP-02IEC 60794-1-21 & ITU-T G.652.DRoHS 2 (2011/65/EU) & REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX ACOUSTALERT G28 DAS FO CABLE <COUNT>F IEC 60794
Delivery form
Fumigated export wooden or steel drums
Standard drum lengths
1000 m · 2000 m · 4000 m (or custom cut lengths)
MOQ
500 m (standard) · 1000 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFAcoustAlert G28 Distributed Acoustic Sensing Fibre Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXAcoustAlert G28 spec data (Excel)All 6 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

How does AcoustAlert G28 improve Distributed Acoustic Sensing (DAS) compared to standard telecom fibre cable?
Standard loose-tube telecom cables intentionally isolate fibres from external mechanical disturbances using wide air gaps. AcoustAlert G28 eliminates internal air voids with an impedance-matched acoustic gel and tightly bonded armour/sheath layers so ground vibrations (0.5 Hz to 5 kHz) couple directly into optical phase shifts without metallic ringing.
Can AcoustAlert G28 perform both acoustic intrusion detection (DAS) and temperature leak detection (DTS)?
Yes. By choosing the hybrid G28-SWA-06SM02MM configuration (6 single-mode G.652.D fibres plus 2 multimode 50/125 µm OM3 fibres), a single buried cable supports coherent Φ-OTDR acoustic sensing on the single-mode cores and Raman DTS temperature sensing on the multimode cores.
What continuous drum lengths are supplied to minimise field splice losses on pipeline routes?
We manufacture AcoustAlert G28 in continuous splice-free lengths of 4,000 m and up to 6,000 m per drum so coherent OTDR optical budget is preserved across 50–80 km interrogator spans.
Is AcoustAlert G28 compatible with third-party Φ-OTDR DAS interrogator units?
Yes. The ITU-T G.652.D / G.657.A1 single-mode optical cores operate at 1550 nm with ≤ 0.20 dB/km attenuation and are compatible with all standard phase-sensitive OTDR and heterodyne DAS interrogators.

Request a quote

Get an engineering quote for AcoustAlert G28

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

AcoustAlert G28 Distributed Acoustic Sensing Fibre Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

DAS AC1 / AC2 series

BRUsens DAS AC1 / AC2

Compact and wire-armoured distributed acoustic sensing fibre cables

View productArmoured strain sensing

BRUsens BSSH V13

Heavy-duty wire-armoured Brillouin/Rayleigh strain sensing cable

View productArmoured DTS temperature

BRUsens DTS BSTE / BSSA M

Stainless-tube wire-armoured distributed temperature sensing cable

View productHigh-temp +300 °C DTS

BRUsens DTS BSTE HT

High-temperature +300 °C FIMT distributed temperature sensing cable

View product
DatasheetRequest a quote