Extensometers are used to accurately measure specimen extension during testing. An extensometer attaches to the test specimen with spring loaded knife edges. Specifications for extensometers include gage length, which is the distance between the knife edges at the start of the test and percent travel during test. Non contacting extensometers are also available.

EX-1200CT

Balanced Long Travel Extensometer
  • Testing Travel — 1200mm (47")
  • Specimen Thickness - 0.2 to 10mm (0.008" to 0.39")
  • Gage Length - Adjustable between 20 to 80mm (0.79" to 3.15")
  • Resolution - 0.025mm (0.001")
    • Optional High Resolution - 0.005 mm (0.0002")

EX-700CT

Balanced Long Travel Extensometer
  • Testing Travel — 700mm (47")
  • Specimen Thickness - 0.2 to 10mm (0.008" to 0.39")
  • Gage Length - Adjustable between 20 to 80mm (0.79" to 3.15")
  • Resolution - 0.025mm (0.001")
    • Optional High Resolution - 0.005 mm (0.0002")

EX-3542

Clip-on Axial Extensometer
  • Available Gauge Lengths: 0.5", 0.64", 1.0", 10mm, 12.5mm, 25mm
  • Extension: +/- 5, 10 , 20, 25%, +50%/- 10%, and +100%/-5%
  • Meets existing ASTM class B-1 and ISO 9513,class 0,5 requirements for accuracy
  • Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max
  • Output: 2 to 4 mV/V, nominal, depending on model
  • Linearity: 0.10% to 0.15% of full scale measuring range, depending on model
 

EX-L01/EX-L05/EX-L15

Laser Extensometer
The LE Model Laser Extensometers are precision, wide-range instruments specifically designed for accurate, non-contact measurement of strain on various materials under tensile or compressive conditions. They take advantage of the latest laser technology in order to achieve high performance with minimal maintenance.  They utilize a unique scanning laser beam technique to measure dimension changes from one side of the subject, eliminating the need for a scan receiver on the opposite side.
  • Measurement Range
    • EX-L01: 8-80 mm
    • EX-L05: 8-127 mm
    • EX-L15: 8-380 mm
  • Resolution
    • EX-L01: 0.001 mm
    • EX-L05: 0.001 mm
    • EX-L15: 0.01 mm
  • Target Distance 250 mm nominal, 500 mm maximum, selectable
  • Scan Rate 100 scans/second
  • Requires target materials on sample:
    • Glass-beaded retro-reflective tape for service to 200 deg. F.
    • Aluminum-backed strip for service to 900 deg. F.

EX-3543

Long Travel Clip-on Axial Extensometer
  • 4 inch (100mm) gage length
  • Travel: 2 (50mm) or 4 (100mm) inches
  • Includes quick attach kit and various knife edges for flat and round specimens
  • May be left on through specimen failure. The unit is designed so that the two halves of the extensometer come apart to prevent damage at specimen failure
  • Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system
  • All standard units meet existing ASTM class B-1 and ISO 9513, class 0,5 requirements for accuracy
  • Hardened tool steel knife edges are easily replaced. A spare set comes with every extensometer
  • Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max
  • Output: 2 to 4 mV/V nominal, depending on model
  • Linearity: 0.15% of full scale measuring range
 

EX-3475

Clip-on Transverse Extensometer
  • 0 to 1 inch diameter/width specimen sizes
  • Travel: +/- 0.02", +/- 0.05", +/-0.1"
  • Self supporting on sample
  • Mounts directly to sample with integral clip springs
  • May be left on through specimen failure
  • All models will measure both positive and negative displacements
  • All standard units meet existing ASTM class B-1 and ISO 9513, class 0,5 requirements for accuracy
  • Linearity: 0.15% of full scale measuring range