....Model 3575 Transverse
    (Diametral) Extensometer ....

For general purpose transverse or diametral strain measurement on axially loaded specimens. May be used simultaneously with Epsilon’s Model 3542 Axial Extensometers.

Self supporting on the test sample, these extensometers will work on any width or diameter specimen from 0 to 1 inch (25 mm). They are commonly used for measurement of Poisson’s ratio, for transverse measurements with anisotropic materials like many composites and for sheet metal testing such as r-value determination. Most often they are used simultaneously with Epsilon’s axial extensometers.

These units easily clip onto the sample, held in place with an integral spring. Rounded contact edges maintain the position on the specimen. All are high accuracy strain gaged units, for compatibility with external electronics.


Wide range of specimen sizes, from 0 to 1 inch (25 mm).
Self supporting on the specimen
Easy to mount, with integral springs to keep the extensometer on the sample.
Full bridge, strain gaged design for compatibility with nearly any test system.
Rugged dual flexure design withstands severe usage.
Ultra-flexible cable, 8 ft long (2.5 m) standard.
May be used for dynamic cyclic testing as well as static.


Linearity: 0.15% of full scale travel
Output: 2 to 4 mV/V nominal, depending on model
Excitation: 10 VDC typical, 15 VDC or VAC max.
Weight: approx 35 grams.
Contact force: adjustable, 200 to 500 g typical
Shunt Calibration Module available

Sheet metal r-value determination with Models 3575 and 3542.

As shown in the photo, a Model 3575 may be used simultaneously with a Model 3542 axial extensometer to measure r-value. Many researchers are now using only this single lateral measurement for their tests, rather than the older method using three manual measurements.

An alternate with dual lateral measurements is the 3575AVG model, which averages readings over two locations.

Model 3575 Available Versions:
ANY combination of travel and temperature range listed below is available.

±0.5 mm ±0.020 in.
±1 mm ±0.50 in.
±2.5 mm ±0.10 in.

Temperature Ranges:

Low: -265 to + 100 C (-450 to +210 F)
Standard: -40 to +100 C (-40 to +210 F)
High 1: -40 to +150 C (-40 to +300 F)
High 21: -40 to +175 C (-40 to +350 F)

1Short term use to 200 C (400 F) acceptable..

For more information on calibration services or digital retrofits please contact us.



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Emlenton, PA 16373
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