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Fiber Optic Strain Gages

Strain Gages (Fiber Optic) | Model FP4000

  • Model FP4000 Fiber Optic Strain Gage.
Model FP4000

The Model FP4000 Fiber Optic Strain Gages are designed for use in environments where it may be difficult to use conventional types of strain gages because of space considerations, high levels of electrical interference or where intrinsic safety is an issue. Measurements of dynamic events are also possible with these gages and the requisite dataloggers. The strain gages have a very low coefficient of thermal expansion and can be used to measure both mechanical and thermo-mechanical strains in a variety of different materials.


Standard Ranges
FP4000-1.0 | −1000 to +1000 µε
FP4000-2.5 | −2500 to +2500 µε
FP4000-5.0 | −5000 to +5000 µε
FP4000-1.0 | 0.15 µε
FP4000-2.5 | 0.30 µε
FP4000-5.0 | 0.50 µε
Gage Factor Accuracy¹
FP4000-1.0 | ±3% F.S.
FP4000-2.5 | ±3% F.S.
FP4000-5.0 | ±10% F.S.
Temperature Sensitivity
0.85 to 1.22 µε/°C
Strain Sensitivity
transverse strain insensitive
Operating Range
−40°C to +80°C
L × W × H
100 × 25 × 1 mm

¹The accuracy of the OSP sensors is determined by sample testing of controlled batches at the factory. The manufacturing technique results in the spans shown above and is confirmed by actual strain tests performed on samples from batch lots.

Please Note: Geokon maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.