The spiral steel tube armored vibration sensing cable is a sensing cable specially designed for micro-vibration fiber sensing systems. Protected by a double-layer stainless steel armored sheath, it features high tensile strength, crush resistance, anti-twisting, anti-rodent-bite, anti-knife-cut, waterproof and moisture-proof performance, softness and toughness, and is suited to all kinds of harsh environments. With a clear layered structure, the optical fiber is sealed inside the steel tube in a free state and is highly sensitive to external micro-vibrations, making it an ideal detection unit for distributed vibration sensing. It is widely applied to intrusion and sabotage prevention in airports, power plants, chemical plants, military fields, borders, prisons, oil pipelines, communication cables, power cables, railways, highways, residential communities, villas, schools, mining areas, small/medium/large factories, enterprises and public institutions, and various key areas.
Product features
Stainless steel flexible tube + stainless steel braided mesh double-layer armor provides strong protection for the optical fiber.
Excellent mechanical properties including high tensile strength, high crush resistance, anti-rodent-bite, anti-knife-cut and anti-bending.
The unique stainless steel flexible tube design enhances the fiber sensitivity to vibration.
Uses a special low-temperature-resistant sheath, enabling normal use in severe cold regions.
The cable is flexible with good toughness, easy to install, deploy and maintain.
Recommended applications
Distributed micro-vibration sensing
Installation methods
Can be installed aerially, shallow-buried, in ducts, or surface-mounted along walls, fences, etc.
Main parameters - Appearance and dimensions
Item
Description
Cable outer diameter
8.0±0.5mm
Cable color
Black
Standard length
1000M-2000M
Main parameters - Materials
Item
Description
Fiber
SiO₂ glass optical fiber
Tensile strength member
Imported DuPont Kevlar from the USA
Stainless steel flexible tube
SUS304
Stainless steel braided mesh
SUS304
Outer sheath
Eco-friendly flame-retardant LSZH sheath
Fiber type
G652D single-mode graded-index optical fiber (corrected from the original typo)
Fiber count
28 fibers
Tight-buffered fiber color
Standard color code
Main parameters - Optical characteristics
Item
Description
Attenuation
≤0.4dB/km(1310nm)；≤0.3dB/km(1550nm)
Effective group index
1.46
Main parameters - Mechanical characteristics
Item
Description
Permissible tensile force
Long-term 400N; short-term 600N
Permissible crushing force
Short-term 4000N/10cm; long-term 3000N/10cm
Bending radius
Static 100mm; dynamic 200mm
Main parameters - Environmental characteristics and others
Item
Description
Applicable temperature
-40℃~+75℃
Reference standards
GB/T 7424.1-2003; YD/T1258.4-2005; GB/T21197-2007 (corrected from the original GB/T2119 to the current standard GB/T21197)
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