Seamless Steel Tube Oil Well Temperature Sensing Cable

Application scenarios

Suitable for temperature monitoring of high-voltage cables.
Meets the temperature monitoring requirements of tunnels, subways, petroleum, mines, chemical and other industries.
Leverages the cable structure advantage to accelerate heat conduction, collect data quickly, and avoid safety accidents in time.

Product features

Excellent mechanical performance, transmission performance and environmental adaptability, in compliance with ITU-T G.651.1.
The inner layer uses an oil-free stainless steel seamless tube for protection with reserved fiber excess length, offering excellent waterproof and moisture-proof performance.
The outer layer is stranded with 304 stainless steel wires for a high-strength design, suitable for deployment in harsh environments such as tunnels and cable trenches, with outstanding tensile and crush load capacity.
Compact outer diameter design for easy deployment in scenarios with scarce duct resources.
Resistant to attacks by rodents and insects such as rats and ants, and capable of withstanding external damage and dust.

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 stranded steel wire seamless steel tube type sensing cable is blue, customizable as required.

Environmental certifications

Item	Unit	Specification	One-side thickness (mm)
Fiber	mm	0.25	-
Stainless steel seamless tube	mm	1.60	0.20±0.05
Stranded 304 stainless steel wires (1)	mm	0.55	-
Stranded 304 stainless steel wires (2)	mm	0.90	-
Cable weight	Kg/km	-	-

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	G652D (single-mode)	MM 50 (multimode)	MM 62.5 (multimode)
Zero-dispersion wavelength λ0 (nm)	1302-1322	1295-1320	1320-1365
Zero-dispersion slope S0 (ps/(nm².km))	≤0.090	≤0.101	≤0.097
Effective group index (1310nm)	1.4670	-	-
Effective group index (1550nm)	1.4677	-	-
Effective group index (850nm)	-	1.481	1.496
Effective group index (1300nm)	-	1.476	1.491
Attenuation (850nm)	-	2.4 dB/km	2.4 dB/km
Attenuation (1300nm)	-	0.7 dB/km	0.7 dB/km

Item	Unit	Multimode specification (MM 50/62.5)
Core/modal diameter	mm	50.0±2.5 / 62.5±2.5
Cladding diameter	mm	125±1
Maximum attenuation	dB/km	3.0（@850nm）；1.0（@1300nm）
Operating temperature	℃	-65～+150 (selectable as required)
Cable outer diameter	mm	4.5±0.20
Cable net weight	kg/km	-
Permissible bending radius	mm	Dynamic 40D; static 20D
Permissible tensile load (long-term)	N	1100
Permissible tensile load (short-term)	N	1500
Crush resistance (long-term)	N/cm	960
Crush resistance (short-term)	N/cm	2000

Marking information

Standard marking: Manufacturer info + Cable type (stranded steel wire seamless steel tube type) + Fiber type (G652D/MM 50/62.5) + Fiber count + Month/Year + XXXXm
Custom marking content available per customer requirements.

Cable drum length

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