Micro All-Metal Strain Sensor (OFDR Optimized) - Small Diameter Strain Gauge - Structural Health Monitoring (SHM) Sensor

Alias： Micro Strain Sensor, OFDR Optimized Fiber Sensor, 0.6mm SST Strain Probe, Small Diameter Strain Gauge, HD-FOS (High-Definition Fiber Optic Sensing), High-Modulus Strain Transfer, Pre-terminated Strain Unit, Metal-clad Fiber Probe, Structural Health Monitoring (SHM) Sensor, Embedded Fiber Sensor, Harsh Environment Strain Sensing, Polyimide Coated Strain Fiber.

1. Product Description of OFSCN® Micro All-Metal Strain Sensor for OFDR

The OFSCN® Micro All-Metal Strain Sensor is a high-precision sensing unit specifically designed for high-spatial-resolution strain monitoring. Encapsulated in a single-layer, high-elasticity special alloy tube, this sensor is optimized for OFDR (Optical Frequency Domain Reflectometry) technology. Featuring factory-pre-installed end-point anchoring and low-reflection FC/APC connectors, it ensures the linear transfer of structural micro-deformations through the high-modulus metallic sheath to the fiber core, enabling millimeter-level distributed strain measurement.

2. Mechanical & Physical Parameters of OFSCN® Micro All-Metal Strain Sensor for OFDR

Designed with high radial stiffness and low mass to ensure superior strain transfer efficiency:

Parameter	Specification	Remarks
Brand	OFSCN®	-
Structure	Single-layer high-elasticity seamless alloy tube	High-modulus hermetic design
Outer Diameter (OD)	0.6 mm	Ultra-fine for embedding or surface bonding
Weight per Meter	Approx. 1.25 g/m	Minimal impact on host structure's properties
Elastic Strain Limit	＞ 3000 με	Linear elastic response range
Tensile Strength	＞ 80 N	Superior to bare fiber for rugged deployment
Crush Resistance	＞ 120 MPa	Resists high side pressure and embedding stress
Min. Bending Radius	30 mm	Static installation
Connector Type	FC/APC	Pre-terminated for low-noise OFDR interface
Termination	Integrated End-point Anchoring	Ensures zero-slip coupling between fiber and tube

3. Internal Fiber Configurations & Temperature Ratings of OFSCN® Micro All-Metal Strain Sensor for OFDR

The sensor can be customized with different single-mode fiber coatings based on the environmental temperature requirements:

Fiber Type	Temp Rating	Typical Applications
OFSCN® G.657 Bend-Insensitive Fiber	85°C	Standard indoor/outdoor SHM
OFSCN® 200°C Polyimide Optical Fiber	200°C	Aerospace, Composite curing monitoring
OFSCN® 300°C Polyimide Optical Fiber	300°C	Industrial kilns, Downhole primary monitoring
OFSCN® Gold-coated Optical Fiber	700°C	Extreme high-temp testing, Engine components

4. Key Advantages for OFDR Applications of OFSCN® Micro All-Metal Strain Sensor for OFDR

• Millimeter Spatial Resolution: The continuous rigidity of the alloy tube ensures seamless strain conduction at the millimeter scale, fully utilizing the high-spatial-resolution capabilities of OFDR.
• High-Modulus Coupling: Unlike plastic jackets, the special alloy tube possesses a significantly higher elastic modulus, enabling the lossless transfer of micro-strains to the fiber core.
• Low Signal Noise: The factory-polished FC/APC connectors minimize Fresnel reflections, drastically improving the Signal-to-Noise Ratio (SNR) for Rayleigh backscatter analysis.