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Strain Gauges

Opsens

  • Fiber optic strain gauge

OSP-A

Article: 00128312

Fiber optic strain gauge

KEY FEATURES
Miniature design (230 ?m diameter)
Outstanding repeatability
Temperature independent
Insensitive to transverse strains
EMI/RFI and microwave immune
Intrinsically safe

APPLICATIONS
EM, RF and microwave environments
High voltage environments
Nuclear and hazardous environments
Civil engineering and geotechnical applications
OEM-type and custom version available

DESCRIPTION
Opsens? new patent pending fabrication process ensures an exact definition of the gauge factor, making OSP-A the most accurate fiber-optic strain gauge sensor in the industry.

Combined with Opsens? WLPI signal conditioning technology (patent #7.259.862) and with the inherent advantages of fiber optics, the OSP-A delivers unprecedented repeatability and reliability in the most adverse conditions such as high levels of electromagnetic fields as well as high voltage and rapid temperature cycling conditions.

The OSP-A uses two optical fibers that are precisely aligned inside a microcapillary tube to form an optical Fabry-Pérot interferometer. This makes the OSP-A strain gauge completely immune to any electromagnetic interference.

It is also completely insensitive to transverse strains and temperature, as opposed to fiber Bragg gratings. Its micro-miniature size also makes the OSP-A fiber optic sensor ideal for space-constrained applications such as intelligent load-sensing bolts and studs. Careful choice of materials for the sensor, fiber coating and cable buffering permits a high temperature operating range from -40 °C to +250 °C.

Specifications

  • Technology: fiber optic

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