OSP-SW - Spot-Weldable Fiber Optic Strain Sensor

Monitoring deformation in the harshest environment

The spot-weldable fiber optic strain sensor of Opsens Solutions is perfectly suited for the most demanding environments and can be easily adapted to be fixed on almost any alloy.

Combined with Opsens Sollutions’ White Light Polarization Interferometry (WLPI) signal conditioning technology (Patent # 7,259,862) and the inherent advantages of fiber optic, the OSP-SW delivers outstanding repeatability and reliability in the most adverse conditions such as those related to subsea environment or offshore platform.

It is completely insensitive to transverse strains. The robust design enables permanent monitoring deformation of immersed infrastructures, even under permanent pressure of  300 bar. A high temperature version is also available for temperature environment up to 250°C.

ADVANTAGE: The sensor can be installed very quickly in the field, when time is a constraint. The “EzHPC Quick Connect” feature allows easy and fast installation: When the sensor is installed, the cable is easily coupled through the special adaptor to reach the signal conditioner. No hassle related to cable management during deployment and no need to prepare cable section with precise length. The “EzHCP” feature provides fast and efficient deployment even in harsh conditions.


  • Perfectly suited for harsh environments such as marine and subsea conditions (seals up to 300 bars)
  • No drift over time. Reliable results during years
  • Intrinsically safe and immune to EMI/RFI
  • Insensitive to transverse strains
  • Metallic strip can be adapted to be spot welded on almost any alloy


  • Offshore platform
  • Wind farms and hydroelectric infrastructures
  • Marine and subsea conditions
  • ATEX and Hazardous environment
  • High voltage environments
  • Aerospace and defense applications
  • Structural health monitoring
  • Civil engineering and geotechnical applications


Measuring range

-1 000 µε


 +1 000 µε

-2 500 µε


 +2 500 µε


0.15 µε

Temperature sensitivity

Depends on alloy used for weldable support

Transverse strain sensitivity


Temperature operating range

0°C to +90°C (Up to +250°C available on special request)

EMI/RFI Susceptibility

Complete immunity

Cable Lenght

Up to 3 km (Sampling rate dependent, consult factory for more details)

Optical connector

SCA (Standard), SC (Standard), other connector available on request

Cable Sheathing

From ruggedized flexible outdoor cable to robust stainless steel cable

Signal conditioner comptability

All Opsens Solutions’ WLPI signal conditioners

Model available

Unsealed OSP-SW, sealed OSP-SW20 (Up to 20 bar), sealed OSP-SW300 (Up to 300 bar)

Opsens Solutions Inc. reserves the right to make any changes to the above specifications without prior notice.

Do you need help to find your optic strain sensor ?