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Extensometers

measure deformation of a material.

See Also: Compression, Flexure, Tensile, Tension, Bending, Twist, Strain

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Extensometers

Tinius Olsen

Tinius Olsen

Extensometers measure strain, the change in length of a specimen divided by the original length (gauge length) of the specimen. Tinius Olsen offers wide range of extensometers based on your testing needs including video, optical and physical contact with specimen.

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Rugged, Long Gauge Length Extensometers

Model 3543

Jinan Testing Equipment IE Corporation

Model 3543 - Jinan Testing Equipment IE Corporation

With over 15 years of proven reliability in the world’s most demanding testing environments, the Model 3543 extensometer is designed to survive in those applications where standard axial extensometers would not. Designed by Epsilon, the Model 3543 was created to survive specimen failure by separating into two halves, thus preventing permanent damage to the module body. During operation, the upper half of the extensometer pulls out of the main body. Tapered measuring beams activate strain gaged f...
With over 15 years of proven reliability in the world’s most demanding testing environments, the Model 3543 extensometer is designed to survive in those applications where standard axial extensometers would not. Designed by Epsilon, the Model 3543 was created to survive specimen failure by separating into two halves, thus preventing permanent damage to the module body. During operation, the upper half of the extensometer pulls out of the main body. Tapered measuring beams activate strain gaged flexures within the unit. This unique design allows long measuring ranges, yet retains compatibility with electronics for strain gaged transducers. These models offer high accuracy and are light weight but rugged, with low operating force. They are tension only units.The units have hardened tool steel knife edges. Standard quick attach wires provided with the extensometer work on flat specimens up to 12 x 31 mm (0.5 x 1.25 inch) and on rounds up to 25 mm (1 inch) diameter. Optional quick attach kit wire forms are available for use on larger samples. See Model 3542L for long gauge lengths with smaller measuring ranges.The Model 3543 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. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
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SSG Series Strain Gauge Extensometers

Shimadzu Corp.

Shimadzu Corp.

Shimadzu’s SSG series of strain gauge extensometers are compliant with ISO, JIS, and ASTM tensile test standards, including those for plastics and metallic materials These lightweight, precision extensometers feature a wide elongation measurement range, while retaining the flexibility to measure using small gauge lengths, and support both rod and flat plate shaped specimens. Consisting of an elongation sensor and amplifier, this extensometer is suitable for use with metals and hard plastic mater...
Shimadzu’s SSG series of strain gauge extensometers are compliant with ISO, JIS, and ASTM tensile test standards, including those for plastics and metallic materials These lightweight, precision extensometers feature a wide elongation measurement range, while retaining the flexibility to measure using small gauge lengths, and support both rod and flat plate shaped specimens. Consisting of an elongation sensor and amplifier, this extensometer is suitable for use with metals and hard plastic materials, and is fastened securely to specimens with screws. Calibration using an extensometer calibrator allows the extensometer to meet JIS and ISO Class 0.5 and ASTM Class C standards for higher accuracy.
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Transverse and Diametral Extensometers

Epsilon Technology Corp.

Epsilon Technology Corp.

3 models cover most any test requirement and can be used with axial extensometers at the same time. Miniature and standard units, also r-value units. Available options cover temperatures from -265 to +200 C (-450 to +400 F).

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Deflection Gauge Extensometers

Lloyd Material Testing

Lloyd Material Testing

We supply a wide range of deflection gauge extensometers ideal for measuring deformation in three and four point bend tests and in compression testing applications.

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Circumferential Extensometers

Model 3544

Jinan Testing Equipment IE Corporation

Model 3544 - Jinan Testing Equipment IE Corporation

Designed for concrete and rock compression testing or for compression tests on other large samples. This model may be used simultaneously with the Model 3542RA axial extensometers.

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Deflection Gauge Extensometers

AMETEK Sensors, Test & Calibration

AMETEK Sensors, Test & Calibration

We supply a wide range of deflection gauge extensometers ideal for measuring deformation in three and four point bend tests and in compression testing applications.

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Extensometers for Simple Performance Testing of Asphalt

Model 3909

Jinan Testing Equipment IE Corporation

Model 3909 - Jinan Testing Equipment IE Corporation

Designed for measuring axial displacements in the simple performance tests prescribed by NCHRP Report 465, and determining dynamic modulus of hot mix asphalt per AASHTO TP062.

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Differential Transformer Type Extensometers

DT Series

Shimadzu Corp.

DT Series - Shimadzu Corp.

ISO Class 1 Compliant Differential Transformer Type Extensometers The ISO 6892-1 standard for tensile testing of metallic materials prescribes Class 1 or higher extensometers, and JIS Z2241 prescribes Class 2 or higher extensometers when measuring withstanding pressure. The DT series includes Class 1 compliant differential transformer type extensometers, which can be used to implement test methods compliant with metal tensile test standards.

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High Temperature Self-Supporting Furnace Extensometers (1200 C)

Model 3448

Jinan Testing Equipment IE Corporation

Model 3448 - Jinan Testing Equipment IE Corporation

Epsilon developed this unique high temperature extensometer for testing metals, ceramics, and composites at the high temperatures produced by furnaces and induction heating systems. A combination of features make these extensometers easier to use and better in performance than other similar high temperature extensometers.The units are held on the specimen by light, flexible ceramic fiber cords. These make the extensometer self-supporting on the specimen. No furnace mounting brackets are required...
Epsilon developed this unique high temperature extensometer for testing metals, ceramics, and composites at the high temperatures produced by furnaces and induction heating systems. A combination of features make these extensometers easier to use and better in performance than other similar high temperature extensometers.The units are held on the specimen by light, flexible ceramic fiber cords. These make the extensometer self-supporting on the specimen. No furnace mounting brackets are required. The side load on the test sample is greatly reduced because of the self-supporting design and light weight of the sensor. Most materials testing furnaces with a side cut-out for an extensometer will readily accept a Model 3448. For induction heating systems, a different ceramic cord placement allows the extensometer to easily pass between the coils.The combination of radiant heat shields and convection cooling fins allow this model to be used at specimen temperatures up to 1200℃ (2200°F) without any cooling. An optional tiny air fan does enhance stability at the highest temperatures and is recommended for the highest accuracy and for tests with small elongations. The fan comes with a magnetic base for support so it can be mounted at any convenient location near the extensometer. Fan cooling is not generally needed for induction heated systems. High purity alumina ceramic rods are used. These are available in lengths as required to fit your furnace. A spare set is included with every extensometer. Specify chisel, vee chisel or conical contact points as desired.Most units operate equally well in tension and compression. Thus tensile, compression and cyclic tests like low cycle fatigue can all be performed with a single unit.For vacuum furnaces, special models are available. Epsilon can also provide a radiant heat transfer cooled version. This requires that the extensometer module be surrounded by a water cooled enclosure with a front slot for the ceramic rods.
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Fracture Mechanics Clip-On Gages

Model 3541

Jinan Testing Equipment IE Corporation

Model 3541 - Jinan Testing Equipment IE Corporation

The Model 3541 is designed for determination of fracture mechanics parameters such as JIC, KIC, R-curve, fatigue crack growth rate (da/dN), and testing to standards such as E1820, E399, E647, etc. These COD gages conform to the requirements of E1820 (the replacement for E813 and E1737) for JIC and R-curve determination. Special configurations are available to meet the requirements of ASTM E399 for fracture toughness (please consult the factory for these configurations). In addition, the modified...
The Model 3541 is designed for determination of fracture mechanics parameters such as JIC, KIC, R-curve, fatigue crack growth rate (da/dN), and testing to standards such as E1820, E399, E647, etc. These COD gages conform to the requirements of E1820 (the replacement for E813 and E1737) for JIC and R-curve determination. Special configurations are available to meet the requirements of ASTM E399 for fracture toughness (please consult the factory for these configurations). In addition, the modified groove design complies with E1820 tests where greater stability and accuracy results from the sharper groove root. Clip-on gages are used for a variety of fracture mechanics tests, including compact tension, arc shaped, disk shaped, bend specimens or other specimen geometries in compliance with ASTM and other standards organization’s test methods. Clip-on gages can be used directly on test specimens where the knife edges are integral with the test specimen or, alternately, with optional bolt-on knife edges mounted on the test specimen.The Model 3541 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. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
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Axial Extensometers

Epsilon Technology Corp.

Epsilon Technology Corp.

6 models in this group cover tension, compression and cyclic testing Huge variety of gauge lengths and measuring ranges Cover temperatures from -265 to +200 °C (-450 to +400 °F)

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Long Travel Extensometers

AMETEK Sensors, Test & Calibration

AMETEK Sensors, Test & Calibration

We provide two long travel extensometers for materials testing; the EZ250Plus and the EX800Plus.The second type is suitable for use with rigid, semi-rigid and ductile materials. The extensometer is supplied with a universal voltage external power supply unit, a loom and a connector to fit a range of machines, as well as a mounting stand.

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Axial Extensometer

Model 3542

Jinan Testing Equipment IE Corporation

Model 3542 - Jinan Testing Equipment IE Corporation

These extensometers are designed for testing a wide range of materials, including metals, plastics, composites and ceramics. All will work in both tension and compression. The dual flexure design makes them very rugged and insensitive to vibrations, which permits higher frequency operation.They come standard with Epsilon’s quick attach kit, making it possible to mount the extensometer on the test specimen quickly and easily with one hand. The quick attach kit can be removed, allowing mounting of...
These extensometers are designed for testing a wide range of materials, including metals, plastics, composites and ceramics. All will work in both tension and compression. The dual flexure design makes them very rugged and insensitive to vibrations, which permits higher frequency operation.They come standard with Epsilon’s quick attach kit, making it possible to mount the extensometer on the test specimen quickly and easily with one hand. The quick attach kit can be removed, allowing mounting of the extensometer with springs or rubber bands.The Model 3542 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. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.For gauge lengths 100 mm (4 inches) or greater see Model 3542L.
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Economical Hydraulic Manual Universal Testing Machine

WEW-D Series

Jinan Testing Equipment IE Corporation

WEW-D Series - Jinan Testing Equipment IE Corporation

WEW-D series hydraulic manual UTM is suitable for testing tension, compression and other strengths of various metallic or nonmetallic materials with high strength. The hydraulic manual UTM is capable of testing the characters of materials on physical & technology properties. As a manual control & economical UTM, the hydraulic manual UTM is with reasonable and reliable configurations (load cell or pressure transducer, extensometer, photoelectric encoder, servo motor & driver, standard...
WEW-D series hydraulic manual UTM is suitable for testing tension, compression and other strengths of various metallic or nonmetallic materials with high strength. The hydraulic manual UTM is capable of testing the characters of materials on physical & technology properties. As a manual control & economical UTM, the hydraulic manual UTM is with reasonable and reliable configurations (load cell or pressure transducer, extensometer, photoelectric encoder, servo motor & driver, standard screws), which can satisfy ordinary testing requirements. Digital controller and computer with software can be equipped on this machine to realize the test date/curve collecting and process. The hydraulic UTM of economical type is easy to operate and is versatile in the applications of metallurgy manufacturers such as steel mills & alloy, reinforced bar etc.
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Miniature Transverse (Diametral) Extensometers

Model 3475

Jinan Testing Equipment IE Corporation

Model 3475 - Jinan Testing Equipment IE Corporation

A miniature extensometer designed for general purpose transverse or diametral strain measurements on small or thin specimens. May be used simultaneously with the Model 3442 miniature axial extensometers or the Model 3542 axial extensometers.

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Contacting Extensometers

Lloyd Material Testing

Lloyd Material Testing

The contacting extensometers are designed for accurate strain and extension measurement of a material up to a maximum sample thickness of 25 mm.

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Axial Torsional Extensometers

Model 3550

Jinan Testing Equipment IE Corporation

Model 3550 - Jinan Testing Equipment IE Corporation

Designed for simultaneously measuring axial and torsional deflections on specimens tested in axial/torsional machines.

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High Temperature Axial Torsional Extensometers (1200 C or 1600 C)

Model 7650

Jinan Testing Equipment IE Corporation

Model 7650 - Jinan Testing Equipment IE Corporation

Model 7650 extensometers are primarily used on round specimens tested in bi-axial test machines capable of simultaneous axial and torsional loading. All models are capable of bi-directional displacement in both axes and may be used for strain-controlled fatigue testing under fully reversed load and strain conditions at frequencies up to 10 Hz.All 7650 models mount rigidly on the load frame and incorporate slide mounting to bring the extensometer into contact with the specimen. The gauge length i...
Model 7650 extensometers are primarily used on round specimens tested in bi-axial test machines capable of simultaneous axial and torsional loading. All models are capable of bi-directional displacement in both axes and may be used for strain-controlled fatigue testing under fully reversed load and strain conditions at frequencies up to 10 Hz.All 7650 models mount rigidly on the load frame and incorporate slide mounting to bring the extensometer into contact with the specimen. The gauge length is set automatically before mounting on the test specimen, which allows for hot mounting after thermal equilibrium has been reached.These units are specifically designed to minimize crosstalk between axes and to provide high accuracy, high resolution measurements. They incorporate capacitive sensors for low operating force and include electronics with programmable filtering and multi-point linearization for improved performance and accuracy. The overall design minimizes, and in many cases virtually eliminates, any influence from common lab environment vibrations.These water-cooled extensometers are equipped with high purity alumina rods with conical rod tips for specimen contact when testing to 1200℃(2200°F). Silicon carbide rods are used for the 1600℃ (2900°F) high temperature option.
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Fiber Optic Extensometer

OpSens Solutions Inc.

OpSens Solutions Inc.

Versatile and reliable fiber optic extensometer. Designed for harsh environment, these multipurpose extensometers are packaged to fit the challenging environment of any structure monitoring applications.

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Miniature Averaging Axial Extensometers

Model 3442RA1

Jinan Testing Equipment IE Corporation

Model 3442RA1 - Jinan Testing Equipment IE Corporation

With gauge lengths of 1 and 2 inches (25 and 50 mm) and measuring ranges of 0.050 and 0.100 inches (1.2 and 2.5 mm), the Model 3442RA1 was designed for applications where tensile or compressive strength tests on small rock, concrete and other small compression samples is desired.

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Static Axial Clip-On Extensionmeters

Instron

Instron

The 2630 series and W-6280 series of extensometers offer speed of attachment and ease of use. The light-weight, rugged cross-brace design eliminates errors caused by physical distortion, while built-in protection ensures that damage is not caused by over-extension. The low operating-force arms of the extensometer reduce the possibility of knife-edge slippage when testing hard or smooth surfaced materials. The 2630 series extensometers can be installed or set in place accurately and consistently,...
The 2630 series and W-6280 series of extensometers offer speed of attachment and ease of use. The light-weight, rugged cross-brace design eliminates errors caused by physical distortion, while built-in protection ensures that damage is not caused by over-extension. The low operating-force arms of the extensometer reduce the possibility of knife-edge slippage when testing hard or smooth surfaced materials. The 2630 series extensometers can be installed or set in place accurately and consistently, with the gauge length locking device automatically releasing itself after attachment, ensuring speed and reliability of operation. This unique "cone-latch" mechanism also overcomes the problems associated with having to remove pins or clips prior to starting a test, or tests being conducted with the extensometer accidentally locked at gauge length. Because of their larger frame size, the W-6280 series extensometers require two handed operation to attach the instrument to the specimen, so these extensometers still rely on a pin to set the gauge length. All extensometers except the W-6235 allow the ability to measure both positive and negative strain allowing compressive or flexural test measurements.The 2630 series and W-6280 series extensometers include different gauge length and strain range options to suit a wide range of specimen characteristics. All 2630 series and W-6280 series extensometers comply with both the ASTM E 83 and IS0 9513 standards, and gauge lengths are available in metric or U.S. customary units. Calibration certificates are supplied, showing the individual performance of each unit at its factory calibration.Static strain measurement on a wide range of materials and specimens including metals, plastics and composites.
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Extensometers for Indirect Tensile Testing of Asphalt

Model 3911

Jinan Testing Equipment IE Corporation

Model 3911 - Jinan Testing Equipment IE Corporation

For indirect tensile testing, such as for resilient modulus, these extensometers measure the lateral deformation of specimens. They are self-supporting on the sample and clip on in seconds. The traditional way this deformation has been measured was prone to errors caused by slight rocking of the sample as it is loaded. The self-supporting design of the Model 3911 eliminates this problem. This unit will handle the dynamic pulse requirements of resilient modulus testing.The speed of mounting makes...
For indirect tensile testing, such as for resilient modulus, these extensometers measure the lateral deformation of specimens. They are self-supporting on the sample and clip on in seconds. The traditional way this deformation has been measured was prone to errors caused by slight rocking of the sample as it is loaded. The self-supporting design of the Model 3911 eliminates this problem. This unit will handle the dynamic pulse requirements of resilient modulus testing.The speed of mounting makes test set-up much faster than with the older method. The pivot mounting used ensures that the specimen contact pads meet the often uneven asphalt surface as well as possible. The measuring range options available allow a wide range of testing, yet can easily measure the sometimes very small displacements required.The Model 3911 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. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
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Averaging Clip-on Extensometer

Instron

Instron

The Instron 2650 Series Biaxial Extensometers are ideally suited for testing a wide range of materials, including polymer matrix composites, metals, and plastics over a range of temperatures. Two sensors measure axial strain on opposite sides of the specimen. Versions are available which provide either a single averaged axial output or 2 independent axial outputs. The extensometers meet the calibration requirements of ASTM E83 class B1, ISO 9513 class 0.5, and ISO 527.

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Auto Calibration for Load & Extensiometer

Jinan Testing Equipment IE Corporation

Jinan Testing Equipment IE Corporation

TE electronic calibration module provides an easy way to calibrate load cell or extensometer and signal conditioning electronics without using a mechanical calibrator. It enables performing on-site electrical calibration and easy to periodically “spot check”, which will help ensure that the load cell and the extensometer and electronics are calibrated correctly.

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Custom Extensometers

Jinan Testing Equipment IE Corporation

Jinan Testing Equipment IE Corporation

Special biaxial extensometer for limiting dome height bulge tester for sheet metal formability testing. Simultaneous X and Y strain measurements are taken.

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Submersible Extensometers

Model 4030

Jinan Testing Equipment IE Corporation

Model 4030 - Jinan Testing Equipment IE Corporation

The Model 4030 extensometer uses a special LVDT-like sensor to measure strains on samples submersed in water or other compatible liquids. The unit is provided with the signal conditioning electronics. The extensometer is a semi-custom design, which is available in smaller measuring ranges up to 5 mm (0.2 inches). Clip-on (COD) style designs are also available.

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Automatic Extensometer

SIE-560A/560SA

Shimadzu Corp.

SIE-560A/560SA - Shimadzu Corp.

To determine the suitability of a material for an application where it is under load, measuring its elongation is important. Measuring elongation enables determination of the elastic modulus (reversible elongation in the elastic region) by measuring the small initial elongation range, and determination of elongation at specimen failure, by measuring larger irreversible elongation in the plastic region. Shimadzu’s SIE-560A series automatic extensometers accomplish both of these measurements with ...
To determine the suitability of a material for an application where it is under load, measuring its elongation is important. Measuring elongation enables determination of the elastic modulus (reversible elongation in the elastic region) by measuring the small initial elongation range, and determination of elongation at specimen failure, by measuring larger irreversible elongation in the plastic region. Shimadzu’s SIE-560A series automatic extensometers accomplish both of these measurements with high accuracy, and provide automated functions that increase testing efficiency and test reproducibility. Ideal for testing a wide variety of materials, including metallic materials, plastics, and composites, the SIE-560A series complies with ISO 527, JIS K 7161, and ASTM D638 standards for plastics tensile testing. In addition, the SIE-560A series supports strain-rate controlled metallic material tensile testing measurements specified in ISO 6892, JIS Z 2241, and ASTM E4
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Diametral Extensometers for Rock and Concrete Testing

Model 3975

Jinan Testing Equipment IE Corporation

Model 3975 - Jinan Testing Equipment IE Corporation

Designed for accurate measurement of small diametral strains such as those required to determine Poisson’s ratio of rock, concrete and asphalt samples. The units are designed to be used in conjunction with the Model 3542RA axial averaging extensometer.

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High Temperature Transverse Extensometers (700 C)

Model 7675

Jinan Testing Equipment IE Corporation

Model 7675 - Jinan Testing Equipment IE Corporation

Designed for transverse or diametral strain measurement in environmental chambers where the entire extensometer must be exposed to elevated temperatures. These capacitive extensometers may be used up to 700 C (1300 F) without any cooling.

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