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Product

fiber optic cable seriesIEC 61757-2-2 DTS316L FIMT + Wire Armour6,000 N/100 mm Crush

BRUsens DTS BSTE / BSSA M Armoured Distributed TemperatureStainless-steel FIMT & steel-wire-armoured distributed temperature sensing (DTS) cable

BRUsens DTS BSTE / BSSA M Armoured Distributed Temperature Sensing Cable featuring strain-free multimode/single-mode optical fibres inside a laser-welded 316L stainless-steel FIMT, helical galvanized or stainless steel wire armour,.

Direct Trench Burial
300 bar 316L FIMT
LSZH / HDPE / PA12
IEC 61757-2-2
Order designation
BRUsens DTS BSTE M-02MM02SM
Outer Ø
6.0 mm
Weight ≈
78 kg/km
Max. pull load
7,000 N
Crush rating
7,000 N/100mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Sensing mode
Raman / BOTDA
Strain-free OM3 + SM cores
Outer Ø
4.6 to 6.5 mm
BSSA M (4.6 mm) · BSTE M (6.0 mm)
Tensile load
3,500 to 7,500 N
Stranded steel wire armour
Crush rating
5,000–7,000 N
per 100 mm radial load
Thermal τ₆₃
≤ 2.2 s in water
All-metallic heat conduction
Temperature
-40 to +85 °C
+125 °C PA12/TPEE option

Typical values for this cable type, based on IEC 61757-2-2 / IEC 60794-1-21 / EN 54-22 — confirmed in the datasheet and quotation for your order.

Application fit

Is BRUsens DTS BSTE / BSSA M right for your machine?

Workhorse wire-armoured DTS sensor for direct burial alongside pipelines and HV power cables, concrete dam embedment, conveyor structures, and subsea/borehole grouting.

Fixed installation

Suitable

Direct burial in pipeline trenches, HV cable backfill, dam concrete lifts, and mining conveyors.

TBM gantry & advancing tunnel reel

Suitable

EN 54-22 LSZH armoured variant resists mechanical impact, water jets and rodents in tunnels.

Immersion & wet locations

Suitable

Laser-welded 316L stainless FIMT withstands 30 MPa (300 bar) hydrostatic pressure.

Energy chain / drag chain

Not suitable

Static wire-armoured temperature sensor; not intended for drag-chain flexing.

Use HITRONIC PCF DUPLEX
Typical machinesOil, Gas, LNG & District Heating Pipeline LeakBuried HV/Subsea Export Cable RTTRConcrete Dam Hydration & Seepage ProfilingMining Conveyor Idler & Coal Stockpile FireGeothermal & Hydrogeological Boreholes

Construction

Layer by layer

BRUsens DTS BSTE / BSSA M showing strain-free OM3 and G.652.D/G.657.A1 fibres in a laser-welded 316L stainless-steel FIMT, galvanized or 316L stainless steel wire armour, and HDPE/PA12/LSZH sheath.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Strain-free DTS sensing fibres2 to 8 × 50/125 µm OM3 multimode and/or 9/125 µm ITU-T G.652.D/G.657.A1 single-mode fibres with controlled EFLIsolates optical fibres from pulling and soil settlement strain
2Laser-welded 316L stainless-steel FIMTHermetically welded AISI 316L stainless-steel tube filled with non-dripping thixotropic gel (or dry gas)100 % moisture and hydrogen barrier up to 300 bar
3Helical steel wire armour (M)Single layer (BSSA M) or heavy/double layer (BSTE M) of galvanized steel or AISI 316L stainless-steel wires3.5–7.5 kN tensile rating & 5,000–7,000 N/100 mm crush
4Outer protective jacketUV-stabilised HDPE (direct burial), Polyamide 12 (chemical/borehole), or flame-retardant LSZH (tunnel/indoor)High thermal conductivity & abrasion resistance

BRUsens DTS BSSA M (Compact Ø 4.6 mm)

316L FIMT + single-layer steel wire armour + PA12/LSZH/HDPE sheath (3.5 kN pull, 5 kN crush)

BRUsens DTS BSTE M (Heavy-Duty Ø 6.0 mm)

316L FIMT + heavy-gauge steel wire armour + HDPE/LSZH sheath for rocky trenches & concrete dams (7.5 kN pull)

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 61757-2-2 / IEC 60794-1-21 / EN 54-22. Values for your order are confirmed in the datasheet and quotation.

Electrical

Sensing principle
Raman OTDR (MM) & Brillouin BOTDA/BOTDR (SM)
Temperature resolution
±0.1 °C (Raman 50/125 µm OM3)
Armour earthing
Metallic FIMT + wire armour bonded at termination cabinet

Thermal

Operating temperature
-40 °C to +85 °C (+125 °C PA12/TPEE option)
Thermal response (τ₆₃)
≤ 2.2 s in water · ≤ 8.0 s in air
Installation temperature
-20 °C to +60 °C

Mechanical

Nominal outer diameter
4.6 mm (BSSA M) · 6.0 mm (BSTE M)
Max. tensile load
3,500 N (BSSA M) · 7,500 N (BSTE M)
Crush resistance
5,000 N/100 mm (BSSA M) · 7,000 N/100 mm (BSTE M)
Min. bend radius
15 × OD static · 20 × OD dynamic

Optical

Multimode DTS fibres
50/125 µm OM3 (≤ 2.4 / 0.6 dB/km @ 850/1300 nm)
Single-mode fibres
ITU-T G.652.D / G.657.A1 (≤ 0.35 / 0.21 dB/km)
Strain-free margin
Zero fibre strain up to full rated installation pull

Resistance

Hydrostatic pressure
30 MPa (300 bar) on 316L FIMT
Rodent & rock impact
100 % steel wire armour (30 J impact Method E4)
Flame option (LSZH)
IEC 60332-3-24, IEC 60754-2 & EN 54-22

Reference standards

DTS sensor standard
IEC 61757-2-2 & EN 54-22
Cable test standard
IEC 60794-1-21 & IEC 60794-1-22
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Sheath colour
Black (HDPE/PA12) or Red/Orange (LSZH)
Fibre colour code
TIA-598-D 12-colour
Customs tariff (HS)
8544.7000

Sizes

6 standard BRUsens DTS BSSA M & BSTE M armoured configurations

Dimensional and mechanical parameters for compact (BSSA M) and heavy-duty (BSTE M) wire-armoured DTS cables.

Dimensions & mechanical ratings
Order designationFibre compliment & jacketOuter Ø
mm		Weight ≈
kg/km		Max. pull
N		Crush
N/100 mm		Enquiry
BSSA M — Compact Wire-Armoured (Ø 4.6 mm)
BRUsens DTS BSSA M-02MM2 × 50/125 OM3 · LSZH/HDPE4.6463,5005,000
BRUsens DTS BSSA M-04MM4 × 50/125 OM3 · LSZH/HDPE4.6473,5005,000
BRUsens DTS BSSA M-02MM02SM2 × OM3 + 2 × G.652.D SM · HDPE4.6473,5005,000
BSTE M — Heavy-Duty Wire-Armoured (Ø 6.0–6.5 mm)
BRUsens DTS BSTE M-04MM4 × 50/125 OM3 · Heavy SWA6.0787,0007,000
BRUsens DTS BSTE M-02MM02SM2 × OM3 + 2 × G.652.D SM · Heavy SWA6.0787,0007,000
BRUsens DTS BSTE M-04MM04SM4 × OM3 + 4 × G.652.D SM · Heavy SWA6.5927,5007,000
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Available with galvanized carbon steel wires (standard) or full AISI 316L stainless-steel armour wires for marine/corrosive soils.

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
100 % eddy-current FIMT weld & bidirectional OTDR testZero weld flaws and ≤ 2.4/0.6 dB/km (OM3) / ≤ 0.35/0.21 dB/km (SM)Every drum length
Sample tests
Tensile & radial crush qualification (IEC 60794-1-21)Up to 7,500 N pull and 7,000 N/100 mm crush with zero fibre strainType qualification
300 bar hydrostatic & thermal cycling (-40 to +85 °C)Δα ≤ 0.05 dB/km across full temperature cycleType qualification

Inspection certificate

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

Product approvals

IEC 61757-2-2 & EN 54-22IEC 60794-1-21 & ITU-T G.652.DRoHS 2 & REACH Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX BRUSENS DTS BSTE/BSSA M ARMOURED DTS CABLE
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

PDFBRUsens DTS BSTE / BSSA M Armoured Distributed Temperature – technical datasheet6 sizes · construction, technical data, approvalsXLSXBRUsens DTS BSTE / BSSA M 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.

What is the difference between BRUsens DTS BSSA M and BRUsens DTS BSTE M?
Both use a hermetically laser-welded 316L stainless-steel central FIMT and helical steel wire armour ('M'). BSSA M is a compact Ø 4.6 mm single-armour design (3.5 kN tensile, 5.0 kN/100 mm crush) for conduits, trays and mining conveyors, whereas BSTE M is a heavier Ø 6.0–6.5 mm design (7.0–7.5 kN tensile, 7.0 kN/100 mm crush) for direct trench burial, concrete dams and downhole grouting.
How does BSTE/BSSA M ensure that ground movement does not cause false temperature readings?
The optical fibres are stranded inside the 316L stainless-steel tube with 0.20–0.35 % excess fibre length (EFL), while the surrounding steel wire armour absorbs up to 7,500 N of external tension. Even in Brillouin DTS systems (which are sensitive to both strain and temperature), the fibres remain completely strain-free.
Can we order BSTE/BSSA M with 316L stainless-steel armour wires instead of galvanized steel?
Yes. For subsea landfalls, saline coastal trenches, acid-leach heaps and sour leachate ponds, we supply both the central FIMT and the outer armour wires in AISI 316L stainless steel.
What continuous drum lengths can be manufactured?
We supply continuous splice-free drum lengths of 2,000 m, 4,000 m and up to 6,000 m on fumigated wooden or steel reels.

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BRUsens DTS BSTE / BSSA M Armoured Distributed Temperature

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