All-Dielectric Gel-Filled Tube Temperature Sensing Cable

Application scenarios

Power system applications: temperature monitoring in cable trenches, cable interlayers, cable tunnels, etc.
Transportation infrastructure: temperature monitoring in tunnels such as expressways and subways.
Building fire protection scenarios: fire temperature monitoring in large buildings such as factories, halls and granaries.
Other scenarios: DTS temperature measurement in environments with strong electric and magnetic field interference, and general temperature measurement needs.

Product features

Fully all-dielectric structure, suitable for complex environments with strong electric and magnetic fields.
Protected by a high-strength PBT tube, with stable and reliable mechanical performance.
Low-loss design with excellent fiber transmission performance.
Flame-retardant outer sheath material with good electrical insulation performance.
High water resistance, no metallic components, simple and practical structure.

Color identification

(1) Fiber colors (corresponding to 1-12 fibers)
Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Purple, Pink, Light Blue
(2) Cable colors (corresponding to 1-12)
Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Purple, Pink, Light Blue
Note: The outer sheath of the standard all-dielectric gel-filled tube temperature sensing cable is blue by default.

Environmental certifications

Item	Unit	Specification	One-side thickness (mm)
Fiber	mm	0.25±0.005	-
PBT gel-filled tube	mm	2.00±0.10	0.45
Kevlar fibers	mm	2.20±0.10	-
Cable outer sheath	mm	4.00±0.20	0.90
Cable weight	Kg/km	120	-

Fiber performance

Test item	MM 50	MM 62.5
Mode field diameter (mm)	50±2.5	62.5±2.5
Cladding diameter (mm)	124.8±1.0	124.8±1.0
Cladding non-circularity (%)	≤1.0	≤1.0
Core-cladding concentricity error (mm)	≤1.5	≤1.5
Coating diameter (mm)	245±7	245±7
Outer coating-cladding concentricity error (mm)	≤12.0	≤12.0

Test item	MM 50	MM 62.5
Zero-dispersion wavelength λ0 (nm)	1295-1320	1320-1365
Zero-dispersion slope S0 (ps/(nm².km))	≤0.101	≤0.097
Effective group index (850nm)	1.481	1.496
Effective group index (1300nm)	1.476	1.491
Typical attenuation (850nm)	dB/km	≤3.0
Typical attenuation (1300nm)	dB/km	≤1.0

Item	Unit	Multimode specification
Fiber count	fiber	1～2
Cable outer diameter	mm	4.00±0.20
Permissible tensile strength (long-term)	N	500
Permissible tensile strength (short-term)	N	800
Permissible crushing force (long-term)	N/100mm	800
Permissible crushing force (short-term)	N/100mm	1000
Permissible bending radius (dynamic)	mm	80
Permissible bending radius (static)	mm	40
Operating temperature (long-term)	℃	-20～85
Operating temperature (short-term 2 hours)	℃	-40～125
Cable net weight	kg/km	120

Marking information

Standard marking: Manufacturer info + Optic Fiber CABLE + MM 50/125 4.0mm + Fiber count + Month/Year + XXXXm
Custom marking content available per customer requirements.

Cable drum length

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