Extensometers for materials testing

Epsilon Technology

Epsilon is committed to providing our customers the highest quality and accuracy in extensometry.
Our Products

Over 35 models cover virtually every materials testing application.

Our Products

Epsilon makes a wide variety of extensometers and calibrators for materials testing. Discover models optimized for your specific application.


If your unit is in need of service, calibration or repair, initiate the RMA process with us and we will be happy to assist.

Download Catalog

Our 2020 Extensometer Catalog, Version 110 is now available! Not finding something you’re looking for? Ask us about a custom quote.

Compatibility Meets High Performance

The combination of years of experience and rugged construction ensures that our extensometers exceed your expectations for performance in nearly any test system controls.
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Contact Epsilon Tech

3975 South Hwy 89, Jackson, WY 83001, USA

Phone: 307-733-8360 / Fax: 307-733-8375

Countries outside the USA with exclusive reps

What’s new at Epsilon

Averaging Axial Extensometers

  This all-purpose averaging axial extensometer is used in tension or compression to measure Young’s modulus, offset yield, and strain to failure. It is compact and lightweight. Gauge length is set automatically for fast specimen mounting. May be left on through...
Epsilon Shunt Calibration System extensometer electrical calibration.

Shunt Calibration System

The Epsilon Shunt Calibration System is available for any strain-gaged extensometer. The Epsilon Shunt Calibration System provides an easy way to calibrate an extensometer and signal conditioning electronics without using a mechanical calibrator. Shunt calibration...

Better Accuracy When Testing Small and Delicate Specimens

Getting more accurate and repeatable test results at short gauge lengths is now easier due to key design updates in the Model 3442 extensometer. Gauge length is now set using a precision pin, significantly improving gauge length accuracy and repeatability when...

Clip-On Extensometer for Sandwich Core Shear Testing and Rigid Cellular Plastic Shear Testing

Clip-on Model 3421 extensometers measure shear strain of foam and honeycomb sandwich cores, as well as rigid cellular plastics. Suitable for measuring shear modulus, 2% offset shear strength, and stress-strain curves prior to specimen failure, they may also be used...

X-Y Planar Biaxial Extensometer Operates in Biaxial Strain Control up to 1600 °C

A new, high-precision tool for planar biaxial strain measurement, the Model 7651 measures X-Y biaxial strains without crosstalk at temperatures up to 1600 °C. Designed for planar biaxial fatigue in strain control and combined X-Y tension testing.

Axial/Torsional Extensometer Measures & Controls Axial and Shear Strains up to 1600 °C

Axial/torsional fatigue testing in strain control as well as combined tension-torsion monotonic tests can be performed with precision using the Model 7650 biaxial extensometer. Specimen contact occurs via ceramic rods, enabling combined axial and shear strain...