The Model FP4911 Fiber Optic Rebar Strainmeter is designed for measuring strains in foundations, slurry walls, precast piles, caissons, bridge abutments, tunnel liners, etc. The standard Model FP4911 (#4 rebar), known as the “Sister Bar,” is installed alongside structural rebar. The Fibre Optic element employed in this sensor makes it particularly suitable where dynamic measurements are to be made and/or on projects where other fiber optic sensors are deployed.
Specifications
| Standard Range | −1000 to +1000 µε |
| Resolution | 0.15 µε |
| Accuracy | ±0.25% F.S. |
| Nonlinearity | <0.5% F.S. |
| Temperature Sensitivity | 0.85 to 1.22 µε/°C |
| Temp. Operating Range¹ | −40°C to +80°C |
| Rebar Size | 4 (Sister Bar) |
| Active Gage Length | 914 mm |
¹Other ranges available on request.
