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An extensometer is a device that is used to measure small changes in the length of an object. It is useful for stress-strain measurements. The name is derived from "extension-meter".
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Equipment
The 3575AVG extensometers from Epsilon are capable of measuring r-values in sheet metal testing. These extensometers average the lateral strain at two locations. They are basically strain gaged devices, making them suitable for use with any electronics designed for strain gaged transducers.
Epsilon’s standard calibrator has a resolution of 0.001mm and measuring range of 50mm. With the digital display and autozero button, the calibration of extensometers is greatly simplified.
Very small and rugged, yet ultra-light weight, these units are widely used for testing small and delicate samples. Ideal for many biomedical tests, as well as for wire and thin sheet materials. Also great for low cycle fatigue testing where short samples are used.
The Epsilon MODEL 3590 axial extensometer features 0.8µinches or 20nm resolution with a measuring range of 2 inches or 50mm.
Epsilon MODEL 3910 Extensometers are intended to test asphalt core specimens having a diameter of 4 to 6 inches. They perform strain measurement in accordance with test method requirements prescribed by the U.S. Federal Highways SHRP program.
Epsilon MODEL 3542 axial extensometers are general purpose instruments suited for compression, axial tensile and cyclic testing.
Imetrum has introduced a new non-contact video extensometer, the Universal Video eXtensometer (UVX), which integrates the accurate measurement capabilities of the UVX-Flexi extensometer with a simple and easy to use design to allow high-volume testing of composite materials.
Epsilon's Model 3542L extensometer is used for long gage length applications that involve low level strain measurements. With a gauge length over 50mm, this device is suitable for tensile and compression testing.
The 3542RA averaging axial extensometers from Epsilon are manufactured for conducting compressive strength tests on concrete, rock, and other large compression samples. These extensometers are capable of measuring axial strain on opposite sides of the test specimen, and the result is an average of the two readings.
Epsilon MODEL 3909 extensometers are designed to measure dynamic modulus of hot mix asphalt in accordance with AASHTO TP062, and to measure axial displacements in the simple performance tests as outlined by NCHRP Report 465.
The LE Model Laser Extensometers are precision, wide-range instruments specifically designed for accurate, non-contact measurement of strain on various materials under tensile or compressive conditions.
The 3548COD high temperature furnace COD gages from Epsilon are used in split type materials testing furnaces with a slot for the ceramic rods. They are strain gaged devices, making them suitable for use with any electronics designed for strain gaged transducers.
The Model 3975 extensometers from Epsilon can evaluate the Poisson’s ratio of concrete, asphalt, and rock samples by precisely measuring small diametral strains in large compression samples. They can be easily integrated with the Model 3542RA axial averaging extensometer.
The model 500L non-contact extensometer from Tinius Olsen is developed for measuring the extension of medium to high elongation materials, typically elastomers.
The LE-05 and LE-15 laser extensometers from Epsilon are high precision. non-contacting instruments developed for strain measurement in materials testing. The self-contained extensometers use advanced laser diode technology.
Epsilon Model 3580 high temperature diametral extensometers can perform diametral or transverse strain measurements at elevated temperatures of up to 1000°C.
The Epsilon Model 3540 deflection gages are extensively used for determining deformations in compression tests, three and four point bend tests, and a range of general purpose deformations.
Tinius Olsen offers a range of horizontal tensile testing machines in capacities of 5 kN (1,000 lbf), 25kN (5,000 lbf), 150 kN (30,000 lbf) and 300kN (60,000 lbf) for maximum tensile testing throughput and capability.
Using a unique laser scanning approach developed by United Calibration Corporation, the United Laser Extensometer permits accurate non-contact extension measurement from the start of the test through sample failure without test interruption.
Epsilon MODEL 3475 is a miniature extensometer that measures transverse or diametral strains on thin or small specimens.
Epsilon Model 3565 bolt extensometers measure small measuring strain ranges in applications such as yield measurement and proof load testing of bolts. Hard conical points are used for contacting the bolt at the center of the head and at the bottom.
The Model 3575 transverse extensometer is used for measuring transverse or diametral strain on axially loaded specimens. It can measure samples of any diameter/width ranging from 0 to 1in.
The MODEL 3448 high temperature extensometers have been developed to be used with induction heating systems and furnaces and these extensometers use the exclusive, self-supporting design of Epsilon.
The Model 3648 extensometer is designed for use with split type materials testing furnaces or induction heaters in low strain applications.
Epsilon Model 3544 circumferential extensometers provide measurements of circumference changes of a specimen when it is compressed.
Easy, quick, one-handed placement is the key to United's Model EZ Extensometer. Designed with a minimum number of moving parts, and "snap-on" mechanization, the unit combines simple operation with reliable, efficient measuring performance.
Epsilon MODEL 3800 elongation extensometers are intended for testing of rubbers, plastics, and elastomers. With longer measuring ranges and unique design, they are capable of testing to failure with minimal sample interaction.
The Model 3560 Extensometer from Epsilon is a single integral unit that can be configured to provide lateral (transverse) strain and averaged axial strain measurement simultaneously.
The advanced new Tinius Olsen video extensometer has been developed for non-contact, accurate measurement of specimen strain and is offered in a range of configurations.
Epsilon MODEL 3543 is a long gauge length extensometer with gauge lengths of 50mm and more and measuring ranges of up to 100mm. This extensometer is ideally suited for testing of long samples such as wire materials, weld joints, steel re-bars.
Instron offers an advanced, high-resolution automatic contacting extensometer that is suitable for a wide range of materials such as plastics, composites, metals and elastomers.
The model 3442RA1 miniature averaging axial extensometers from Epsilon are strain gaged devices used for performing tensile or compressive strength tests on concrete, small rocks, and other small compression samples.
MODEL 3541 fracture mechanics clip-on gages are compliant with standard test methods like ASTM E1820 for determining the fracture toughness characteristics of metallic materials.