Model EAS - Standard Axial Extensometer

For general purpose axial tensile, compression, and cyclic testing.  May also be used simultaneously with model ETS transverse extensometer for measurement of Poisson's ratio.

Our model EAS axial extensometer is designed around our new, cross-flexure module.  This innovative design provides improved performance and ruggedness over existing units. 



Model EAS also features our unique axial Quick Attach System.  This attachment system is designed to provide easy attachment while not unduly influencing the extensometer's output.  The wire forms on our system are designed to transmit the attachment force axially through the extensometer and reduce the bending moment found in the competition's design. The system includes round and flat wire forms for both round and flat specimens.  If you prefer to attach the extensometer with springs or rubber bands, spring mounts are provided with the unit.  

All model EAS extensometers feature a full, 350 ohm, strain gauge bridge design and are compatible with most any brand test equipment.  We can install the proper connector to interface to most any electronics including Instron.  If your test frame or set-up does not have the required strain signal conditioner, we can supply stand-alone electronics calibrated with your extensometer. This will allow you to use a chart recorder, digital display, or data acquisition card. 

All standard models meet ASTM B-1 and ISO 9513, class 0,5 accuracy requirements.  Each extensometer comes with an inspection certificate traceable to NIST, a spare parts kit, a spare set of tool-steel knife edges, and a quality, foam lined, plastic case.

Standard models available in any combination of measuring range and temperature range listed below.   If you need an extensometer in a configuration other than what is listed, please contact us with you specific needs.

 

Features 

• Designed for use through specimen failure.
• Full Wheatstone Bridge, 350 ohm, strain gauge design.
• Linearity of 0.15% or better for most standard models.
• Rugged, true, dual flexure design for improved performance.
• All models measure both positive and negative displacements.
• Packaged in high quality, foam lined, case.
• Self-supporting and easy to mount with adjustable, integral contact force springs.

Specifications 

Excitation:   5 to 10 VDC recommended, 12 VDC or VAC maximum 

Output:   2 to 4 mV/V nominal

Linearity:   0.10% to 0.15% of full measuring range

Cable:   Ultra-flexible, 8 ft. (2.5 m) standard cable

Warranty:   Full one year warranty

Options

Bare leads or connector to interface to most any brand test equipment

Special knife edges

Special wire forms for large or odd shaped specimens

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