For the Supply and Support of
Material Testing Equipment
in the United Kingdom and Ireland
Automatic Gauge Length Extensometers - Model 3742
Clip-on extensometers featuring automatic gauge length setting for fast, repeatable mounting to samples — no gauge pins required. Switch gauge lengths in seconds using the new Quick-Swap gauge length system. Built for productivity with high precision.
The Model 3742 clip-on extensometer is designed for fast mounting and high testing efficiency. It is ideal for laboratories that require frequent specimen and gauge length changes, reduced setup time, and consistent, repeatable strain measurements. The 3742 is applicable for testing a wide range of materials, including metals, plastics, composites, and ceramics, in both tension and compression.
This model sets the gauge length automatically as the extensometer is mounted on the specimen. Gauge length pins are not required. Gauge lengths can be changed in seconds, without tools, using the 3742’s new Quick Swap gauge length system, and fine adjustments can be made to ensure that the gauge length remains within tolerance. Clamping force is easily adjusted without tools.
The Model 3742 includes Epsilon’s quick attach kit as a standard feature, allowing the extensometer to be mounted quickly and easily.
Model 3742 extensometers are applicable for testing in accordance with the following standards:
• ISO 6892-1, 527-2, 527-4, 527-5, 10113
• ASTM E8, E9, D3039, D638, A370, D3552, E517, E646
Model 3742 extensometers are strain gaged devices, making them compatible with any electronics designed for strain gaged transducers. Most often they are connected to a test machine controller with electronics for a strain channel, and Epsilon will equip the extensometer with a compatible connector wired to plug directly into the controller. For systems lacking the required electronics, Epsilon can provide a variety of solutions for signal conditioning and connection to data acquisition systems or other equipment.
For gauge lengths less than 25 mm or 1 inch, Epsilon offers the more compact Model 3442. For gauge lengths between the increments in Model 3742’s gauge length table, see Model 3542. For gauge lengths greater than 100 mm or 4 inches, see Model 3542L. Epsilon ONE non-contacting extensometers will also work with a wide range of gauge lengths.