Fiso SFO-W

Fibre optic strain sensor

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Key Features
  • Immune to EMI/RFI/lightning
  • Intrinsically safe
  • Static/dynamic response
  • High sensitivity and resolution:0.01% full scale
  • Signal transmitted over long distances
  • No interference due to fibre bending
  • Absolute measurements in engineering units
  • Data-acquisition compatible
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Designed for long-term, precise strain measurements

A fibre optic strain sensor used for long-term, precise strain measurements on a variety of structures such as nuclear power plants and dams. It is resistant to corrosive environments and suited for spot-welding on steel surfaces. Intrinsically safe, it is immune to EMI, RFI, and lightning. It allows static/dynamic measurement and can deliver signal transmitter over long distances with no interference due to fibre bending.

The SFO-W consists of a small diameter stainless steel tube welded on a steel sheet, suitable for spot-welding on steel surfaces.

The sensor is based on a unique fibre optic strain sensor which constitutes a breakthrough in fibre optic sensing. The extrinsic Fabry-Perot strain sensor is bonded inside the steel tube, thereby following the tensile or compressive movements of the spot-welded sensor.



Strain range ±1000 με, ±1500 με, ±1000 με
Resolution¹ 0.01% of full scale
Transverse sensitivity <0.1% of full scale
Connector type ST connector
Operating temperature −40 to 85°C (−40 to 185°F)

¹ - Signal conditioner dependent.