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Strain Gages - Model 4911 • 4911A Rebar Strainmeters

Model 4911 • 4911A Rebar Strainmeters

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 strain gages can be substituted, or added (Model 3911/3911A).

Specifications 4911 &4911A
Standard Ranges 2500 microstrain Temperature Range –20°C to +80°C
Sensitivity 0.4 microstrain Sizes (4911) #4 Rebar (Sister Bar)
(4911A) 6, 7, 8, 9, 10, 11 and 12
Accuracy ±0.25% F.S. Length (4911) 1384 mm
(4911A) 1105 mm
Nonlinearity < 0.5% F.S.