Sandwich Core Shear and Rigid Cellular Plastic Shear Testing Extensometers – Model 3421
• Replaces homemade extension gages and LVDTs with a reliable, repeatable solution.
• Simple clip-on design attaches in seconds.
• May be left on through specimen failure when fixturing is used to constrain thickness expansion of the specimen.
• Meets ASTM C273 requirements for extensometers.
• Extensometer measuring arm has mechanical overtravel stops for durability.
• Replaceable components for ease of repair.
• Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system.
• Includes high quality foam lined case.
• Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system.
• All standard units have linearity readings of 0.20% or better.
• Rugged, dual flexure design for improved performance.
• Includes high quality foam lined case.
• Breakaway arm to help prevent extensometer damage in the event of bolt failure.
• Self-supporting on the bolt specimen typically without the need for centering or punch marks.
Options
Connectors to interface to nearly any brand test equipment
Shunt calibration module
Specification
Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max.
Output: 2 to 4 mV/V
Accuracy: ±5.0 mm/±0.200” measuring ranges:
≤0.005 mm for displacement values <0.5 mm
≤1.0% of reading for displacement values ≥0.5 mm
±2.5 mm/±0.100” measuring ranges:
≤0.001 mm for displacement values <0.25 mm
≤0.4% of reading for displacement values ≥0.25 mm
Temperature Range: Standard (-ST) is -40℃ to +100℃ (-40°F to 210°F)
Cable: Integral, ultra-flexible cable, 2.5 m (8 ft) standard
Specimen Size: Thickness (including core and both loading plates): 20-75 mm (0.8–3.0 inches); width: 40 mm (1.5 inch) minimum, 50-150 mm (2-6 inches) typica
TE Forcespeed Corporation