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Product

fiber optic cable seriesIEC 61757-2-2 DTS100 % Metal-FreeCPR Cca / IEC 60332-3

BRUsens DTS AHFO Distributed Temperature Sensing Fibre CableAll-dielectric halogen-free flame-retardant distributed temperature sensing (DTS) cable

Q: Why is an all-dielectric DTS cable preferred when strapping onto HV power cables or switchgear?

Metallic-tube DTS cables strapped along single-core 110–400 kV power cables pick up induced sheath voltages and require complex earthing segmentation at every link box. BRUsens DTS AHFO is 100 % metal-free, eliminating induced currents, earth loops and flashover hazards inside MV/HV switchgear.

Q: Why combine 2 multimode (OM3) and 2 single-mode fibres in the AHFO-02MM02SM hybrid model?

Short-to-medium range Raman DTS interrogators (up to 15 km) use 50/125 µm OM3 multimode fibres for high Stokes/anti-Stokes photon counts, while the 2 single-mode fibres provide long-range Brillouin DTS/DAS capability or optical data telemetry.

Q: Can DTS AHFO be used for Lithium-Ion Battery Energy Storage System (BESS) thermal runaway detection?

Yes. Its Ø 4.0–4.5 mm all-dielectric LSZH body bends tightly (R = 40 mm) across battery module terminals without short-circuit risk and detects cell overheating with < 8 s air thermal response.

Q: When should we upgrade from DTS AHFO to BRUsens DTS BSSA N or BSTE/BSSA M?

If the cable is exposed to high hydrostatic pressure, rodent attack, concrete pouring or temperatures above +125 °C, upgrade to stainless-steel FIMT models BSSA N (non-metallic jacket over 316L tube), BSTE/BSSA M (wire armoured), or BSTE HT (+300 °C).

BRUsens DTS AHFO Distributed Temperature Sensing Fibre Cable featuring an all-dielectric (metal-free) aramid/FRP-reinforced construction and fast-thermal-response LSZH jacket for Raman/Brillouin temperature monitoring in HV cable.

IEC 60332-3 LSZH

100 % Dielectric

HV Cable & Tray

IEC 61757-2-2

DTS AHFO configuration

Order designation: BRUsens DTS AHFO-02MM02SM
Outer Ø: 4.5 mm
Weight ≈: 21 kg/km
Max. pull load: 1,000 N
Max. operating temp: 85 °C

All sizes (4)

Request a quote Datasheet WhatsApp

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

Sensing mode: Raman / BOTDA
Dielectric: 100 % Metal-Free
Outer Ø: 4.0 to 5.2 mm
Temperature: -40 to +85 °C
Tensile load: 600 to 1,200 N
Flame rating: IEC 60332-3-24

Typical values for this cable type, based on IEC 60794-2-20 / IEC 61757-2-2 / EN 54-22 — confirmed in the datasheet and quotation for your order.

Application fit

Is BRUsens DTS AHFO right for your machine?

Designed for environments where metallic tubes cannot be used due to HV induction, earthing circulates, or ATEX/cleanroom non-sparking rules.

Fixed installation

Suitable

Straps directly onto HV/MV power cable outer sheaths, busbars, battery racks and cable trays.

Switchgear & control cabinet wiring

Suitable

All-dielectric 4.0 mm body routes safely inside MV/LV switchgear bays and transformer cubicles.

TBM gantry & advancing tunnel reel

Suitable

Halogen-free flame-retardant LSZH jacket complies with utility tunnel and metro fire codes.

Energy chain / drag chain

Not suitable

Static linear heat & temperature sensor; not intended for high-cycle drag chains.

Use HITRONIC PCF DUPLEX

Typical machinesHV/EHV Power Cable Real-Time Thermal RatingBESS Lithium-Ion Battery Rack Fire DetectionMV Switchgear & Busduct Hot-Spot MonitoringSemiconductor Cleanrooms & Data CentresRoad, Metro & Utility Cable Tunnels

Construction

Layer by layer

BRUsens DTS AHFO showing strain-free 50/125 µm OM3 multimode and 9/125 µm single-mode fibres in a dry-buffered high-thermal-conductivity tube, aramid/glass yarn strength layer, and LSZH jacket.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Strain-free DTS sensing fibres	2 or 4 × 50/125 µm OM3 graded-index multimode fibres (plus optional 2 × G.657.A1 SM fibres)Zero mechanical strain bias for ±0.1 °C Raman DTS accuracy
2	High-thermal-conductivity buffer tube	Thin-wall dry PBT/TPEE micro-tube providing controlled excess fibre length (EFL)Thermal response time τ₆₃ < 8 s in air / < 2.5 s in water
3	All-dielectric aramid & glass yarn	High-modulus polyaramid and E-glass yarns with dry water-blocking swellable yarn600–1,200 N tensile strength without any metallic induction hazard
4	Halogen-free LSZH / TPEE outer jacket	Flame-retardant LSZH (IEC 60332-3-24, IEC 60754-2, IEC 61034-2) or +125 °C TPEESafe for indoor tunnels, switchgear and HV cable strapping

BRUsens DTS AHFO-LSZH (-40/+85 °C)

Ø 4.5 mm all-dielectric LSZH cable for HV power cables, tunnels and BESS racks

BRUsens DTS AHFO-HT (-40/+125 °C)

Ø 4.8 mm high-temperature halogen-free TPEE jacket for busducts and transformer windings

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60794-2-20 / IEC 61757-2-2 / EN 54-22. Values for your order are confirmed in the datasheet and quotation.

Electrical

Dielectric design: 100 % metal-free all-dielectric (no grounding needed)
Sensing principle: Raman OTDR (MM) & Brillouin BOTDA (SM)
HV sheath strapping: Zero induced circulating current on 66–500 kV cables

Thermal

Operating temperature: -40 °C to +85 °C (LSZH) · -40 °C to +125 °C (HT)
Thermal response (τ₆₃): ≤ 2.5 s in water · ≤ 8.0 s in moving air
Installation temperature: -15 °C to +60 °C

Mechanical

Outer diameter: 4.0 mm to 5.2 mm
Max. tensile load: 800 N (standard) · 1,200 N (reinforced)
Crush resistance: 1,200 N / 100 mm
Min. bend radius: 10 × OD static · 15 × OD dynamic

Optical

Multimode DTS fibres: 50/125 µm OM3 bend-insensitive (IEC 60793-2-10 A1a.2)
Attenuation (OM3): ≤ 2.4 dB/km @ 850 nm · ≤ 0.6 dB/km @ 1300 nm
Single-mode fibres: ITU-T G.657.A1 (≤ 0.35 / 0.21 dB/km @ 1310/1550 nm)

Resistance

Flame propagation: IEC 60332-1-2 & IEC 60332-3-24 Cat C
Halogen-free & smoke: IEC 60754-1/2 (pH ≥ 4.3) & IEC 61034-2 (≥ 60 %)
Water blocking: Dry water-swellable yarns per IEC 60794-1-22 F5B

Reference standards

DTS sensor standard: IEC 61757-2-2 & EN 54-22 Linear Heat Detection
Cable standard: IEC 60794-2-20 Indoor/Outdoor Optical Cables
RoHS & REACH: 2011/65/EU & EC 1907/2006 compliant

Identification

Outer sheath colour: Red (Fire/LHD), Orange, or Black LSZH
Fibre colour code: TIA-598-D 12-colour
Customs tariff (HS): 8544.7000

Sizes

4 standard BRUsens DTS AHFO all-dielectric temperature sensing models

Dimensional, thermal and optical specifications for metal-free halogen-free DTS cables.

Dimensions & thermal ratings
Order designation	Fibre compliment	Outer Ø mm	Weight ≈ kg/km	Max. pull N	Max. temp °C
All-Dielectric Halogen-Free DTS Cables
BRUsens DTS AHFO-02MM	2 × 50/125 OM3 MM · LSZH	4.0	16	800	85
BRUsens DTS AHFO-04MM	4 × 50/125 OM3 MM · LSZH	4.5	21	1,000	85
BRUsens DTS AHFO-02MM02SM	2 × OM3 MM + 2 × G.657.A1 SM · LSZH	4.5	21	1,000	85
BRUsens DTS AHFO-HT-04HYB	2 × OM3 + 2 × SM · +125 °C TPEE	4.8	25	1,200	125

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
All models are 100 % non-metallic and safe for direct contact with high-voltage power cables and busbars.

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
100 % bidirectional OTDR attenuation test	≤ 2.4 / 0.6 dB/km (OM3) and ≤ 0.35 / 0.21 dB/km (SM)	Every drum length
Sample tests
Thermal step response & cycling test	Zero excess attenuation across -40 to +85/+125 °C; τ₆₃ ≤ 2.5 s in water	Type qualification
Bunched flame, smoke & halogen-free test	Pass IEC 60332-3-24, IEC 60754-2 and IEC 61034-2	Type qualification

Inspection certificate

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

Product approvals

IEC 61757-2-2 & EN 54-22 LHDIEC 60332-3-24 & IEC 60754-2 LSZHRoHS 2 & REACH Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX BRUSENS DTS AHFO METAL-FREE LSZH IEC 60332-3

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 AHFO Distributed Temperature Sensing Fibre Cable – technical datasheet4 sizes · construction, technical data, approvals XLSXBRUsens DTS AHFO spec data (Excel)All 4 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.

Why is an all-dielectric DTS cable preferred when strapping onto HV power cables or switchgear?

Metallic-tube DTS cables strapped along single-core 110–400 kV power cables pick up induced sheath voltages and require complex earthing segmentation at every link box. BRUsens DTS AHFO is 100 % metal-free, eliminating induced currents, earth loops and flashover hazards inside MV/HV switchgear.

Why combine 2 multimode (OM3) and 2 single-mode fibres in the AHFO-02MM02SM hybrid model?

Short-to-medium range Raman DTS interrogators (up to 15 km) use 50/125 µm OM3 multimode fibres for high Stokes/anti-Stokes photon counts, while the 2 single-mode fibres provide long-range Brillouin DTS/DAS capability or optical data telemetry.

Can DTS AHFO be used for Lithium-Ion Battery Energy Storage System (BESS) thermal runaway detection?

Yes. Its Ø 4.0–4.5 mm all-dielectric LSZH body bends tightly (R = 40 mm) across battery module terminals without short-circuit risk and detects cell overheating with < 8 s air thermal response.

When should we upgrade from DTS AHFO to BRUsens DTS BSSA N or BSTE/BSSA M?

If the cable is exposed to high hydrostatic pressure, rodent attack, concrete pouring or temperatures above +125 °C, upgrade to stainless-steel FIMT models BSSA N (non-metallic jacket over 316L tube), BSTE/BSSA M (wire armoured), or BSTE HT (+300 °C).

Request a quote

Get an engineering quote for BRUsens DTS AHFO

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

01Selected sizes

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03Message for our engineers

BRUsens DTS AHFO Distributed Temperature Sensing Fibre Cable

Selected sizes:


Reel & motion:
- Reel type: 
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Datasheet Request a quote

BRUsens DTS AHFO Distributed Temperature Sensing Fibre CableAll-dielectric halogen-free flame-retardant distributed temperature sensing (DTS) cable

Fixed installation

Switchgear & control cabinet wiring

TBM gantry & advancing tunnel reel

Energy chain / drag chain

BRUsens DTS AHFO-LSZH (-40/+85 °C)

BRUsens DTS AHFO-HT (-40/+125 °C)

Electrical

Thermal

Mechanical

Optical

Resistance

Reference standards

Identification

Inspection certificate

Product approvals

Company certificates

01Selected sizes

02Reel & motion

03Message for our engineers

BRUsens DTS BSSA N

BRUsens DTS BSTE / BSSA M

BRUsens DTS BSTE HT

Industrial Breakout FO Cable