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Rebar Strainmeters (VW) | Model 4911 · 4911A
Cảm biến đo biến dạng Geokon 4911 - 4911A
The Model 4911 Rebar Strainmeter is designed for measuring strains in foundations, slurry walls, precast piles, caissons, bridge abutments, tunnel liners, etc. The standard Model 4911 (#4 rebar), known as the “Sister Bar,” is installed alongside structural rebar. Larger models (4911A) are available for welding directly into structural rebar. Where short-term dynamic measurements are to be made, bonded resistance (Model 3911/3911A) strain gages can be substituted, or added.
Standard Range 3000 µε
Resolution 0.4 µε
Accuracy¹ ±0.25% F.S.
Nonlinearity <0.5% F.S.
Temperature Range² −20°C to +80°C
Rebar Sizes 4911 | 4 (Sister Bar)
4911A | 6, 7, 8, 9, 10, 11, 12
Active Gage Length 914 mm
¹Accuracy established under laboratory conditions.
²Other ranges available on request.