....Model 3550 Axial
    Torsional Extensometer ....

Self Supporting Version

High Temperature Version

For simultaneously measuring axial and torsional deflections on specimens tested in axial/torsional machines.

This model extensometer is most often used on round specimens tested in bi-axial test machines capable of simultaneous axial and torsional loading. The extensometer is often customized for particular applications. All units are capable of bi-directional travel, so they may be used for cyclic testing under fully reversed loading conditions.

Models are available for use in materials testing furnaces and with induction heating, provided with high purity alumina rods for specimen contact. These are externally supported and use a special bracket for load frame mounting. Other models are self supporting on the specimen and used for room temperature testing.

All models are designed specifically to minimize crosstalk between axes and to provide high accuracy measurements. All feature the strong, dual flexure design common to other Epsilon extensometers.

Because these transducers are so often used for specialized tests, contact Epsilon with your specific test needs. We can then recommend the ideal configuration specifically for your tests.


Linearity: Depends on model, generally within 0.15%
Output: 2 to 4 mV/V, depending on model
Excitation: 10 VDC typical, 15 VDC or VAC max.
Cable: ultra-flexible cable, 8 ft (2.5 m) standard

Axial/Torsional Extensometer, Model 3550-0100-010-002

Unique design directly measures the surface shear strain angle. Allows operation on a wide range of specimen diameters without changing calibration. This model is features a 1 inch gage length, with 10% axial strain and 2.5 torsional shear strain angle (note this corresponds to a 10 angle of twist on a 0.5 inch diameter specimen).

This model is self-supporting on the specimen and works on specimen diameters from 0.375 to 1.25 inches. It features rugged strain gaged design, with both axial and torsional strain averaged on opposite sides. Available options cover temperature ranges from -265 to +175 C (-40 to +100 C standard). Metric versions available.



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Emlenton, PA 16373
(724) 867-6664 or (800) 793-1870
FAX (724) 867-1346

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