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Product

ATEX M2 stainless-tube SWA DTS fire-sensing cable IEC 60331-25 / ATEX M2Laser-Welded SS FIMT960 N/cm Crush SWA

DTS STEEL FRNC (N45) ATEX M2 DTS Optical Sensing CableDTS STEEL FRNC (N45) 3.8 mm distributed temperature sensing (DTS) optical fire-detection cable for ATEX Group I M2 mining conveyors and tunnels, combining multimode fibres in a laser-welded stainless-steel tube, steel wire armour and FRNC jacket.

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per IEC 60331-25 / IEC 60332-3-22 / ATEX M2 across -40 to +85 °C.

Flame-retardant

Approved

Water-resistant

Outdoor & humid

Configuration

Order designation: DTS STEEL FRNC (N45) 2×G50/125 µm
Outer Ø ≈: 3.8 mm
Net weight ≈: 32 kg/km
Tensile rating ≈: 2.0 kN
Core / stranding: Laser-welded SS FIMT + SWA

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: Optical
Operating temp.: -40 to +85 °C
Min. bend radius: 15 × OD
Core / conductor: 2–4×G50/125 µm
Outer protection: SWA + FRNC 3.8mm
Standard: IEC 60331-25

Typical values for this cable type, based on IEC 60331-25 / IEC 60332-3-22 / ATEX M2 — confirmed in the datasheet and quotation for your order.

Application fit

Is DTS STEEL FRNC (N45) right for your machine?

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per IEC 60331-25 / IEC 60332-3-22 / ATEX M2 across -40 to +85 °C.

Mine roadway & tunnel wall hangers

Suitable

Engineered for underground mining shafts, galleries and tunnel infrastructure per IEC 60331-25 / IEC 60332-3-22 / ATEX M2.

Fixed installation

Suitable

Suitable for vertical shaft cleats, gallery messenger hooks and tray routing within 15 × OD.

Free-hanging vertical run

Suitable

Supports inclined roadway and vertical mine shaft suspension within rated kN load across -40 to +85 °C.

Festoon & line chain

Not suitable

Not optimized for high-speed overhead crane C-track festoon loops; select a dedicated festoon cable.

NGFLGÖU Flat Rubber Festoon Cable

Typical machinesMining & TunnellingUnderground Coal & Hard-Rock MiningOpen-Cast Excavators, Draglines & ShovelsVertical Mine Shafts, Hoists & BoreholesTunneling, Mineral Processing & Slurry Plants

Construction

Layer by layer

Shown: DTS STEEL FRNC (N45) (IEC 60331-25 / IEC 60332-3-22 / ATEX M2) featuring dts sensing fibres (2×g50/125 µm), laser-welded stainless-steel tube and atex i m2 frnc outer sheath (ø 3.8 mm) (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	DTS Sensing Fibres (2×G50/125 µm)	Two graded-index multimode high-temperature DTS optical sensing fibres
2	Laser-Welded Stainless-Steel Tube	Hermetically sealed stainless-steel loose tube protecting the 2 sensing fibres
3	Direct Steel Wire Armour (960 N/cm)	Steel armour wires stranded directly over steel tube for rapid thermal response
4	ATEX I M2 FRNC Outer Sheath (Ø 3.8 mm)	Black flame-retardant zero-halogen jacket (IEC 60331-25 fire integrity rated)

DTS STEEL FRNC (N45) — Standard Mining Execution

Built to IEC 60331-25 / IEC 60332-3-22 / ATEX M2 with dts sensing fibres (2×g50/125 µm) and atex i m2 frnc outer sheath (ø 3.8 mm)

DTS STEEL FRNC (N45) — Custom Drum Length & Gland Kit

Available in custom shaft/roadway drum lengths or pre-terminated assemblies

DTS STEEL FRNC (N45) — Routine & Flame Test Certified

Supplied with EN 10204 3.1 routine dielectric, resistance & flame test report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60331-25 / IEC 60332-3-22 / ATEX M2. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: Optical (IEC 60331-25 / IEC 60332-3-22 / ATEX M2)
Core / conductor construction: DTS Sensing Fibres (2×G50/125 µm) — Two graded-index multimode high-temperature DTS optical sensing fibres
Primary dielectric / buffering: Laser-Welded Stainless-Steel Tube — Hermetically sealed stainless-steel loose tube protecting the 2 sensing fibres

Thermal

Continuous operating temperature: -40 to +85 °C (mining & industrial service)
Short-circuit / peak thermal rating: Verified thermal stability per IEC 60331-25 / IEC 60332-3-22 / ATEX M2
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: ATEX I M2 FRNC Outer Sheath (Ø 3.8 mm) — Black flame-retardant zero-halogen jacket (IEC 60331-25 fire integrity rated)
Minimum bending radius: 15 × OD
Crush, impact & abrasion duty: Heavy-duty mining rock-cut, impact and tensile protection per IEC 60331-25 / IEC 60332-3-22 / ATEX M2

Resistance

Flame retardancy & mine fire safety: Self-extinguishing / flame-retardant mining jacket per IEC 60331-25 / IEC 60332-3-22 / ATEX M2
Mine water, oil & chemical resistance: Resistant to acidic mine water, hydraulic oils and abrasion per IEC 60331-25 / IEC 60332-3-22 / ATEX M2
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: IEC 60331-25 / IEC 60332-3-22 / ATEX M2
Flame & environmental test standards: IEC 60332 / MSHA / EN 60794 / IEC 60228
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: DTS STEEL FRNC (N45)
Sheath colour & metre marking: Continuous metre-marked black mining outer sheath
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard DTS STEEL FRNC (N45) mining & industrial configurations

Manufactured to IEC 60331-25 / IEC 60332-3-22 / ATEX M2 for underground mining, open-cast excavation, shaft and heavy industrial systems.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Tensile rating kN ≈	Min. bend R mm
DTS STEEL FRNC (N45) Construction Schedule (-40 to +85 °C)
DTS STEEL FRNC (N45) 2×G50/125 µm	2 × G50/125 µm Multimode	Laser-welded SS FIMT + SWA	3.8	32	2.0	57
DTS STEEL FRNC (N45) 4×G50/125 µm	4 × G50/125 µm Multimode	Laser-welded SS FIMT + SWA	3.8	33	2.0	57
DTS STEEL FRNC (N45) 2×MM + 2×SM Hybrid	2×G50/125 + 2×SM G.652.D	Laser-welded SS FIMT + SWA	4.0	36	2.2	60

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core cross-sections, pair/fibre counts, armour grades and factory drum lengths available per IEC 60331-25 / IEC 60332-3-22 / ATEX M2.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
2 × G50/125 µm Multimode	2.50	≤2.5 / 0.7 dB/km @ 850/1300 nm	-40 to +85 °C
4 × G50/125 µm Multimode	2.50	≤2.5 / 0.7 dB/km @ 850/1300 nm	-40 to +85 °C
2×G50/125 + 2×SM G.652.D	0.36	IEC 60331-25 750 °C (90 min)	-40 to +85 °C

Every production length undergoes routine conductor DC resistance, high-voltage Spark/AC dielectric or OTDR continuity and dimensional verification.

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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
Conductor resistance, continuity & dimensional verification (IEC 60331-25 / IEC 60332-3-22 / ATEX M2)	DC resistance at 20 °C / optical attenuation and outer diameter within IEC 60331-25 / IEC 60332-3-22 / ATEX M2 tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (IEC 60331-25 / IEC 60332-3-22 / ATEX M2)	Zero dielectric breakdown and verified insulation resistance over full production length	Every manufactured drum length
Sample tests
Flame propagation, mechanical crush & thermal ageing qualification (IEC 60331-25 / IEC 60332-3-22 / ATEX M2)	Verified flame retardancy, mechanical integrity and thermal endurance across -40 to +85 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

IEC 60331-25 CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX DTS STEEL FRNC (N45) IEC 60331-25 Optical CE

Delivery form: Heavy-duty export fumigated wooden drums or steel mine reels
Standard lengths: 500 m, 1,000 m or custom continuous shaft/reeling lengths
MOQ: 100 m (standard configurations) · 500 m (custom builds)
Lead time: 2–5 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFDTS STEEL FRNC (N45) ATEX M2 DTS Optical Sensing Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXDTS STEEL FRNC (N45) spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-24
Updated: 2026-10-24

FAQ

Questions engineers ask first

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

What governing standard and construction define DTS STEEL FRNC (N45) (DTS STEEL FRNC (N45) ATEX M2 DTS Optical Sensing Cable)?

DTS STEEL FRNC (N45) (DTS STEEL FRNC (N45) ATEX M2 DTS Optical Sensing Cable) is manufactured in accordance with IEC 60331-25 / IEC 60332-3-22 / ATEX M2 for Optical duty over -40 to +85 °C. Its 4-layer construction comprises DTS Sensing Fibres (2×G50/125 µm), Laser-Welded Stainless-Steel Tube and ATEX I M2 FRNC Outer Sheath (Ø 3.8 mm).

What is the minimum bending radius and operating temperature range for DTS STEEL FRNC (N45)?

The minimum bending radius for DTS STEEL FRNC (N45) is 15 × OD across its continuous operating temperature range of -40 to +85 °C, ensuring mechanical and dielectric reliability in mining and heavy industrial service.

How are the concentric layers of DTS STEEL FRNC (N45) arranged from inside to outside?

From inside to outside, the construction sequence is: (01) DTS Sensing Fibres (2×G50/125 µm) (Two graded-index multimode high-temperature DTS optical sensing fibres); (02) Laser-Welded Stainless-Steel Tube (Hermetically sealed stainless-steel loose tube protecting the 2 sensing fibres); (03) Direct Steel Wire Armour (960 N/cm) (Steel armour wires stranded directly over steel tube for rapid thermal response); (04) ATEX I M2 FRNC Outer Sheath (Ø 3.8 mm) (Black flame-retardant zero-halogen jacket (IEC 60331-25 fire integrity rated)).

What factory test certificates are supplied with DTS STEEL FRNC (N45)?

Every production drum of DTS STEEL FRNC (N45) undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per IEC 60331-25 / IEC 60332-3-22 / ATEX M2, and is delivered with an EN 10204 3.1 factory test certificate.

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01Selected sizes

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02Reel & motion

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03Message for our engineers

DTS STEEL FRNC (N45) ATEX M2 DTS Optical Sensing Cable

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