Axial Extensometer – Model 3542

• May be left on through specimen failure in most applications.i

• Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system.
• All models can measure in both tension and compression and can be used for cyclic testing.
• Standard quick attach kit allows one hand mounting to specimens.
• Rugged, dual flexure design for strength and improved performance. Much stronger than single flexure designs, this also allows cyclic testing at higher frequencies.
• All models have mechanical overtravel stops in both directions. Cable stops are used for overtravel protection where required. Epsilon’s cable stops are fully contained between the arms of the extensometer and do not hang below where they can interfere with fixturing–especially during compression testing.
• Hardened tool steel knife edges are easily replaced. A spare set of standard knife edges and a set of 3-point knife edges come with every model 3542.
• Gauge length adapter kits enable configuration of multiple gauge lengths with one extensometer.
• Replaceable arms and spacers for ease of repair.
• High and low temperature options extend operation from as low as -270 °C to +200 °C (-454 °F to +400 °F).
• Includes the Epsilon Shunt Calibration System for on-site electrical calibration.
• Includes high quality foam lined case.

Download Data Sheet

Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max.

Output: 2 to 4 mV/V, nominal, depending on model

Accuracy: Standard configurations meet ASTM E83 class B-1 accuracy requirements for gauge lengths ≥20 mm and class B-2 for <20 mm. All standard configurations meet ISO 9513 class 0,5. A test certificate is included.

Linearity: ≤0.15% of full scale measuring range

Temperature Range: Standard (-ST) is -40 °C to +100 °C (-40 °F to 210 °F)

Cable: Integral, ultra-flexible cable, 2.5 m (8 ft) standard

Standard Quick Attach Kit:
– Wireforms are included for round samples 2-25 mm (0.08-1.0 inch) diameter and flats up to 12 mm thick by 31 mm wide (0.5 inch by 1.25 inch); wireforms are available for many other specimen sizes – contact Epsilon
– Rubber bands and springs for attachment are also included
– Model 3442 is recommended for specimen diameters <2 mm

Operating Force: Depends on model configuration; 10 to 100 g typical

Download Data Sheet

• Quick attach kit wireforms or cable attachment for large specimens
• Adapter kits to change gauge lengths
• Connectors to interface to nearly any brand of test equipment
• Special coatings and stainless steel knife edges available for biomedical tests 
• Specialty Knife Edges

Download Data Sheet

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  3542-025M-010 axial extensometer with reinforced plastic specimen

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  3542-0200-010 tension compression extensometer with carbon fiber composite specimen

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  3542-0200-025 tension compression extensometer with plastic specimen

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  Model 3542 Quick Attach feature enables mounting with one hand

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  Model 3542 extensometer with optional cable attachment for large diameter samples

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  3542 extensometer with D695 fixture and specimen

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  3542 extensomter in its case