Testing Accessories » Frame Accessories » Electromechanical Frame Accessories » Safety Light Curtain

Safety Light Curtain

An invisible infrared barrier that pauses crosshead movement the instant the hazard zone is crossed, protecting operators with no door to open or reset between specimens.

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Frame Compatibility

FAQs

Instron 68SC Universal Testing System Configured with a Light Curtain and Bluehill Universal software operator dashboard

Full front view of an Instron 68SC universal testing machine enclosed within a black and yellow safety light curtain, pneumatic side-action grips mounted on the load frame, and an ergonomic handset on the right side.

Operator in safety glasses reviewing test method configuration on a Bluehill Universal software Operator Dashboard next to an Instron 68SC-2 Autoinjector Testing System enclosed within a yellow safety light curtain frame with red optical camera illumination visible inside the fixture enclosure

Overview

In high-volume testing, every step between specimens adds up. Instron® safety light curtains streamline the process by keeping protection active in the background, so operators can stay focused on the test. An invisible infrared field guards the hazard zone, protecting operators from pinch and crush hazards without adding steps to their workflow.

Safety light curtains are fully integrated with the 6800 Series handset and Bluehill® Universal software, so system status is always visible and protection fits into the workflow your team already knows.

Safety Built Into the Workflow

Protection stays active automatically. There's no button to press, no key to leave bypassed, and no door to reset.

Note: The infrared beams are invisible to the eye. Green and red are used here only to visually represent system status — shifting to red to illustrate the automatic shutdown when the detection threshold is crossed.

Frame Compatibility

Catalog Number	Frames
Frame Mounted Light Curtains
CP135426	3400 and 6800 Series Dual Column Table Model Frames
Full System Light Curtain Enclosures
CP140310	3400 and 6800 Series Single Column Frames
CP137603	3400 and 6800 Series Single Column Frames with Extended Front Clearance
CP139513	3400 and 6800 Series Dual Column Table Model Frames (standard height, standard width) - Full enclosure with left and right side doors

Frequently Asked Questions

Does the light curtain protect against flying debris or specimen fragments?

No. The light curtain protects against crush and pinch hazards from moving system components — it doesn't protect against flying debris or specimen fragments. If your testing involves brittle or composite materials, a full debris shield with an interlock door is recommended instead.

Does the light curtain replace the need for a physical guard or interlocked door?

Will the light curtain hold up in a busy industrial or lab environment?

How fast does the light curtain stop the crosshead?

Does the light curtain slow down testing?

What certifications does the light curtain meet?

Talk to an Instron Expert.

Not sure which safety configuration fits your lab? Our application engineers can help you match the right light curtain setup to your frame and safety requirements.

Resources

Instron Catalog: Accessories for Materials Testing

Testing Systems » Universal Testing Systems » 6800 Series Universal Testing Systems » 68TM Table Model Universal Testing Systems

68TM Table Model Universal Testing Systems

Backed by our 10-Year Mechanical Systems Warranty, the 6800 Series dual column table model systems (68TM) combine the accuracy and versatility your lab demands with capacity now extending up to 100 kN.

Quick Links

Compare Models

Frame Configurator

Accessories

Brochure(opens in new tab)

Manuals

Three 68TM table model universal testing systems side by side, showing standard, extra-height with environmental chamber, and extra-width frame configurations with Bluehill Universal software.

Close-up of manual wedge grips and an automatic contacting extensometer mounted on an Instron 68TM-50 table model universal testing system, with the Bluehill Universal software operator dashboard in view.

Three-point flexure fixture with a metal test specimen positioned on an Instron 68TM-100 table model universal testing system, with the Bluehill Universal software operator dashboard in view.

Instron 68TM table model integrated into an AT3 automated testing system with a specimen rack and automated loading actuator, enclosed for unattended automated testing.

Instron 68TM-30 table model universal testing system configured with five parallel test stations and pneumatic grips for high-throughput testing.

Overview

Precision Performance. Engineered Versatility.

The 6800 Series dual column table model systems are engineered for application versatility — plastics, elastomers, adhesives, textiles, electronics, and medical devices, with higher-capacity models extending into metals and composites. Compatible with a wide range of grips, fixtures, and accessories, including temperature chambers and our full range of extensometry, these frames give your testing program room to grow.

Force capacities up to 100 kN
Available in extra-height and extra-width configurations
Powered by Bluehill® Universal software for accurate, efficient testing
Backed by a global service network supporting more than 30,000 Instron^® systems annually

NEW — 100 kN TABLE MODEL

Compact. Powerful. Ready to Deliver Exceptional Performance.

The 100 kN table model delivers the highest force capacity we've ever offered in a tabletop frame — built for high-strength alloy and composite testing, and among the most versatile universal testing systems we offer.

Standards & Test Types

Test to the Standards Your Industry Requires

Industries

One System. Endless Testing Possibilities.

Operator loading a green plastic dogbone specimen into pneumatic side action tensile grips on a 6800 Series 68TM table model, with an AVE3 non-contact video extensometer positioned for strain measurement.

Plastics

Configure with extensometry and automation options built for high-throughput plastics testing, and add an environmental chamber when your program calls for non-ambient conditions.

Metals

High-force tensile, flexure, and compression testing on metals, with automatic gain adjustment for stable, closed-loop strain control. The new 100 kN table model is well suited for high-strength alloy testing.

Technician positioning a battery pouch cell component between compression platens on a 6800 Series 68TM table model for mechanical compression testing.

Electronics

Add signal conditioning modules to synchronize mechanical test data with continuity, temperature, resistance, and other electrical measurements — for a fuller picture of electronic device performance under load.

Specifications

Compare Models

Not sure which configuration is right for your lab? Use our interactive frame configurator to visualize height and width options as you plan your setup.

Launch Frame Configurator

	68TM-5	68TM-10	68TM-30	68TM-50	68TM-100
Force Capacity	5 kN	10 kN	30 kN	50 kN	100 kN
Crosshead Travel	1163 mm (E1) 1648 mm (E2)	1163 mm (E1) 1648 mm (E2)	1119 mm (E1 F1) 1605 mm (E2 F1) 1066 mm (E1 F2) 1522 mm (E2 F2)	1119 mm (E1) 1605 mm (E2)	1097 mm (E1) 1582 mm (E2)
Vertical Test Space	1234 mm (E1) 1739 mm (E2)	1234 mm (E1) 1739 mm (E2)	1190 mm (E1 F1) 1695 mm (E2 F1) 1137 mm (E1 F2) 1642 mm (E2 F2)	1190 mm (E1) 1695 mm (E2)	1168 mm (E1) 1672 mm (E2)
Horizontal Test Space	420 mm	420 mm	420 mm (F1) 947 mm (F2)	420 mm	420 mm
Maximum Speed	3048 mm/min	2032 mm/min	1016 mm/min	762 mm/min	508 mm/min
Minimum Speed	0.001 mm/min
Maximum Return Speed	3500 mm/min	2100 mm/min	1100 mm/min	800 mm/min	508 mm/min
Position Control Resolution	9.9 nm	4.9 nm	2.6 nm (F1) 2.8 nm (F2)	1.8 nm	2.69 nm
Frame Axial Stiffness	45 kN/mm	50 kN/mm	140 kN/mm (F1) 88 kN/mm (F2)	180 kN/mm	180 kN/mm
Maximum Force at Full Speed	2.5 kN	5 kN	15 kN	25 kN	50 kN
Maximum Speed at Full Force	1524 mm/min	1016 mm/min	508 mm/min	381 mm/min	254 mm/min
Footprint Dimensions (mm) (h × w × d) *	1640 x 760 x 715 (E1) 2170 x 760 x 715 (E2)	1640 x 760 x 715 (E1) 2170 x 760 x 715 (E2)	1640 x 760 x 715 (E1 F1) 2170 x 760 x 715 (E2 F1) 1605 x 1280 x 715 (E1 F2) 2135 x 1280 x 715 (E2 F2)	1640 x 760 x 715 (E1) 2170 x 760 x 715 (E2)	1640 x 760 x 715 (E1) 2170 x 760 x 715 (E2)
Weight	139 kg (E1) 154 kg (E2)	139 kg (E1) 154 kg (E2)	196 kg (E1 F1) 215 kg (E2 F1) 453 kg (E1 F2) 471 kg (E2 F2)	255 kg (E1) 278 kg (E2)	266 kg (E1) 295 kg (E2)
Maximum Power Requirements	1400 VA	1400 VA	1400 VA (F1) 1500 (F2)	1400 VA	1200 VA

Definitions: E1 = standard height; E2 = extra height; F1 = standard width; F2 = extra wide
* The footprint width is for the system only. The Operator Dashboard monitor may add 450 mm to the overall width of the frame.

Accessories

Often Configured With

Three tensile grip types for 68TM table model testing systems: screw side-action grip, mechanical wedge grip, and pneumatic side-action grip.

Tensile Grips

Extensometers

Environmental chamber mounted on a 6800 Series 68TM table model universal testing system.

Environmental Chambers

Torsion Add-On

Annex C.2 Luer cone breakage fixture mounted on a 6800 Series testing system, used for syringe and Luer connector breakage testing in medical device quality control.

Biomedical Test Fixtures

Automated XY stage on a 6800 Series 68TM table model, positioning a printed circuit board array over a flexure fixture for automated bend testing.

Electronics Test Fixtures

AT3 automated testing system with specimen rack loading flexure test specimens onto a 6800 Series 68TM-10 table model for automated plastics flexural testing.

Automation

Grid of 68TM table model accessories including a load cell, pneumatic grip, axial clip-on extensometer, Bluehill software interface, compression platen, and flexure fixture.

View All Accessories

Service & Support

A Team You Can Count On, for the Life of Your System

Calibration

Maintain compliance with industry testing standards and ensure accurate, reliable results with regular calibration services.

Training

Get your team up to speed quickly with operator and engineer-level training, on-site or virtual.

Live Diagnostics

Get help fast with remote diagnostics via Instron Connect, resolving many issues without waiting on a site visit.

Service Agreements

Choose the coverage that fits your lab, from preventive maintenance to full parts and labor — available from day one.

Frequently Asked Questions

What warranty comes with the 6800 Series table model systems?

Every new 68TM system comes standard with a one-year Factory Warranty covering everything on the order associated with the frame, plus our 10-Year Mechanical Systems Warranty — the first of its kind in the materials testing industry — covering key components including the crosshead, columns, guide posts, ball screws, base beam, layshaft assembly, and pulleys and belts. Extended warranty coverage is also available, purchased either at the time of sale or prior to the expiration of the Factory Warranty.

What is the maximum force capacity of the 68TM table model?

Can the 68TM table model meet ISO 6892-1 and ASTM E8/E8M requirements?

Can these systems support Nadcap-aligned testing programs?

What software runs the 68TM table model?

What accessories are compatible with the 68TM table model?

What's the difference between a single column and dual column table model?

Talk to an Instron Expert

Every material, standard, and test method has its own demands. Tell us what you're testing, and one of our applications engineers will help you configure the right frame, load cell, grips, and software for your lab — no guesswork required.

Documentation Library

	68TM-5	68TM-10	68TM-30	68TM-50	68TM-100
Preinstallation Manual
Operator's Guide
3D STEP Files	Find Your Frame

Resources

Universal Testing Systems » 6800 Series Universal Testing Systems » 68FM Floor Model Universal Testing Systems

68FM Floor Model Universal Testing Systems

The 6800 Series floor model systems (68FM), engineered for labs that run demanding tests day in and day out, deliver dependable performance at maximum rated capacity up to 300 kN and are backed by our 10-year Mechanical Systems Warranty.

Quick Links

Compare Models

Frame Configurator

Accessories

Brochure(opens in new tab)

Manuals

Five Instron 6800 Series floor model universal testing systems shown side by side in a range of frame height, width, base, and fixture configurations.

Lab operator in safety glasses and a yellow sweater loading a tensile specimen into hydraulic wedge grips on an Instron universal testing machine using a hydraulic wedge grip controller, with the AVE3 advanced video extensometer mounted on the left column illuminating the test space in red light

Instron 68FM-100 universal testing system with two high-temperature furnaces mounted on the frame for elevated temperature metals tensile testing.

Instron 68FM universal testing system in extra height configuration with an environmental chamber, furnace, hydraulic wedge grips, video extensometer, and AlignPro alignment device mounted in the load string, with Bluehill Universal software.

Instron AT3 automated testing system configured with a floor model 6800 Series universal testing machine enclosed in a transparent safety enclosure with automated specimen handling, AVE3 Advanced Video Extensometer illumination visible inside, and Instron Bluehill Universal software visible on the attached Operator Dashboard.

Overview

Precision Performance. Engineered Versatility.

The 6800 Series floor model systems are engineered for the toughest demands of metals and composites testing — tensile, compression, and flex at forces up to 300 kN. That capability extends well beyond, from plastics and electronics to medical components and countless other materials. Compatible with hundreds of grips and fixtures, these systems support configurations for many of the most common ASTM and ISO test methods.

Multiple height and width configurations to fit your lab's space and workflow
Alignment performance capable of meeting Nadcap requirements, supporting accreditation for aerospace and other regulated testing programs
Powered by Bluehill^® Universal software for faster, easier, more accurate testing
Backed by a global service network supporting more than 30,000 Instron^® systems every year, from installation to repairs and calibration.

Frame Engineering

High-Force. Continuous Testing.

Every 6800 Series floor model is designed around what matters most in high-force testing: consistent performance under continuous use, durability that protects your investment, and a testing station your operators can work at comfortably, day after day.

Every 6800 Series floor model is built using high-grade materials and expert engineering to meet the highest performance standards. That engineering shows up in the details: gasketing and a patent-pending airflow design reduce debris ingress, internal electrical and mechanical hardware is located safely away from the test area, and the 12 mm metal work surface is treated with an abrasion-resistant coating for durability.

That unwavering commitment to durability and reliability is why we back every 6800 Series system with our 10-Year Mechanical Systems Warranty — the first of its kind in the materials testing industry.

Standards & Test Types

Test to the Standards Your Industry Requires

ASTM

E8/E8M

A370

A615

E21

F606

D3039

D6641

D3410

D2344

ISO

6892

6892-2

10113

14126

527-4

527-5

14125

14130

Test Types

Tensile

Compression

Flexure

Shear

Torsion

Industries

Built for Testing Metals, Composites, and Beyond

$Close-up of a steel rebar specimen undergoing tensile failure between hydraulic wedge grips on an Instron 68FM universal testing machine, with debris particles visible at the point of fracture$

Metals

High-force tensile, flexure, and elevated temperature testing on plate, rod, and bar specimens, with closed-loop strain control for precise, repeatable results.

Engineer in safety glasses closely inspecting a composite test specimen loaded in an Instron compression testing fixture mounted between precision mechanical wedge grips.

Composites

Alignment performance that meets Nadcap requirements, with fixture compatibility for a wide range of composite test methods.

Close-up of an Instron 68FM-300 floor model universal testing machine with hydraulic wedge grips.

Plastics and More

Test plastics, electronics, medical components, and more — accurate to ± 0.5% of reading down to 1/1000th of load cell capacity, meaning fewer load cell swaps.

Specifications

Compare Models

Not sure which configuration is right for your lab? Use our interactive frame configurator to visualize height and width options as you plan your setup.

Launch Frame Configurator

	68FM-100	68FM-300
Force Capacity	100 kN	300 kN
Crosshead Travel	1407 mm (E1) 1906 mm (E2)	1359 mm (E1) 1858 mm (E2)
Vertical Test Space	1494 mm (E1) 1993 mm (E2)	1446 mm (E1) 1945 mm (E2)
Horizontal Test Space	575 mm (F1)	575 mm (F1) 934 mm (F2)
Maximum Speed	1016 mm/min (1PH) 1080 mm/min (3PH)	560 mm/min (3PH)
Minimum Speed	0.00005 mm/min	0.00005 mm/min
Maximum Return Speed (1 & 3 Phase)	1016 mm/min (1PH) 1160 mm/min (3PH)	640 mm/min (3PH)
Position Control Resolution	2.215625 nm	1.140395 nm
Frame Axial Stiffness	300 kN/mm	350 kN/mm
Maximum Force at Full Speed	50 kN (1PH) 75 kN (3PH)	150 kN
Maximum Speed at Full Force	508 mm/min (1PH) 762 mm/min (3PH)	280 mm/min (3PH)
Footprint Dimensions (h × w × d)*	2287 x 1140 x 786 mm (B1 E1 F1) 2787 x1140 x 786 mm (B1 E2 F1) 2587 x 1140 x 786 mm (B2 E1 F1) 3138 x 1140 x 786 mm (B2 E2 F1 J1)**	2287 x 1140 x 786 mm (B1 E1 F1) 2787 x 1140 x 786 mm (B1 E2 F1) 2301 x 1499 x 786 mm (B1 E1 F2) 2801 x 1499 x 786 mm (B1 E2 F2) 2587 x 1140 x 786 mm (B2 E1 F1) 3138 x 1140 x 1090 mm (B2 E2 F1 J1) 2601 x 1499 x 786 mm (B2 E1 F2) 3152 x 1499 x 1090 mm (B2 E2 F2 J1)
Weight	799.2 kg (B1 E1 F1) 860.9 kg (B1 E2 F1) 861.3 kg (B2 E1 F1) 1013.6 kg (B2 E2 F1 J1)***	871.5 kg (B1 E1 F1) 947.6 kg (B1 E2 F1) 1170.4 kg (B1 E1 F2) 1246.6 kg (B1 E2 F2) 933.6 kg (B2 E1 F1) 1100.3 kg (B2 E2 F1 J1)* 1232.5 kg (B2 E1 F2) 1399.3 kg (B2 E2 F2 J1)*
Maximum Power Requirements	3000 VA (1PH) 4200 VA (3PH)	4200 VA (3PH)

Definitions: B1 = short base; B2 = tall base; E1 = standard height; E2 = extra height; F1 = standard width; F2 = extra wide; J1 = stabilizers
* The Operator Dashboard monitor may add 500 mm to the overall width of the frame.
** Dimension includes height and depth of required stabilizers. For other variants optioned with stabilizers, add 51 mm to height and 304 mm to depth.
*** Weight includes required stabilizers. For other variants optioned with stabilizers, add 90.5 kg.

Accessories

Often Configured With

Two Instron tensile grip types shown side by side: a manual wedge grip on the left and a large capacity hydraulic wedge grip on the right

Tensile Grips

Extensometers

Environmental Chamber on 68FM Universal Testing Machine

Environmental Chambers

Instron 68FM-100 dual column universal testing system with one high-temperature furnace actively mounted in the test space and a second furnace staged to the left of the load frame for rapid exchange

Furnaces

Compression After Impact Composite Testing Fixture

Composite Test Fixtures

Instron 68FM universal testing system with a debris shield in the closed position on the left and the debris shield door open on the right, with hydraulic wedge grips

Debris Shields

Industrial robot arm precisely loading a tensile specimen into hydraulic wedge grips on an Instron 68FM universal testing machine as part of the Instron AT6 automated testing system in a multi-system laboratory environment

Automation

Six-panel grid of Instron testing accessories: a 100 kN load cell, a 10 kN pneumatic side-action grip, a clip-on extensometer, testing software on a desktop monitor, a compression platen, and a three-point flexure fixture

View All Accessories

Service & Support

A Team You Can Count On, for the Life of Your System

Calibration

Maintain compliance with industry testing standards and ensure accurate, reliable results with regular calibration services.

Training

Get your team up to speed quickly with operator and engineer-level training, on-site or virtual.

Live Diagnostics

Get help fast with remote diagnostics via Instron Connect, resolving many issues without waiting on a site visit.

Service Agreements

Choose the coverage that fits your lab, from preventive maintenance to full parts and labor — available from day one.

Frequently Asked Questions

Can these systems support Nadcap-aligned testing programs?

Yes. The 6800 Series floor models offer alignment performance capable of meeting Nadcap requirements, along with fixture compatibility to support a range of composite test methods.

What software runs the 6800 Series floor model systems?

What warranty comes with the 6800 Series floor model systems?

Every 68FM system comes standard with a one-year Factory Warranty covering everything on the order associated with the frame, plus our 10-Year Mechanical Systems Warranty — the first of its kind in the materials testing industry — covering key components including the crosshead, columns, guide posts, ball screws, base beam, layshaft assembly, and pulleys and belts. Extended warranty coverage is also available, purchased either at the time of sale or prior to the expiration of the Factory Warranty.

Can I test delicate or low-force materials on a high-capacity floor model?

What accessories are compatible with the 6800 Series floor model systems?

What force capacities are available for the 6800 Series floor model systems?

What base height options are available for the floor model systems?

Talk to an Instron Expert

Documentation Library

	68FM-100	68FM-300
Preinstallation Manual
Operator's Guide
3D STEP Files	Find Your Frame

Resources

Testing Accessories » Peel, Friction, and Puncture Test Fixtures » Coefficient of Friction Fixture

Coefficient of Friction Fixture

Catalog Number 2810-005

Specifications

Data Sheet

FAQs

Close-up of an Instron 68SC universal testing machine with ASTM D1894 / ISO 8295 coefficient of friction fixture with a weighted sled on a blue film specimen laid across the horizontal test platform, with Bluehill Universal software visible on the operator dashboard.

Instron 68SC-5 single column universal testing system configured with a ASTM D1894 / ISO 8295 coefficient of friction fixture and horizontal test platform, with the Bluehill Universal software displaying the test navigation interface.

Close-up of a lab operator's hands connecting a tow line hook to a weighted sled wrapped with a film specimen on a yellow film specimen taped to the horizontal test platform of an Instron coefficient of friction fixture

Two-panel image showing Bluehill Universal software displaying a real-time load vs. peel extension graph with coefficient of friction results on the left, and a film-wrapped weighted sled on a yellow film specimen on the coefficient of friction test platform on the right

Overview

The Instron^® 2810-005 Coefficient of Friction Fixture measures the static and kinetic coefficient of friction of plastic film and sheet, in accordance with ASTM D1894 and ISO 8295. A weighted sled is pulled across a fixed horizontal table while a load cell records the force required — giving you accurate, repeatable friction data your quality and R&D teams can trust.

The fixture mounts directly into your universal testing system using Instron's standard Type D base grip adapter, so you can add coefficient of friction testing to an existing frame without buying dedicated equipment.

Benefits

Test your way — Mount the specimen to the sled, the table, or both, so you can match the fixture setup to your exact material and test requirements.
Start testing right away — Comes with both a nylon and a metal tow line included, so you're ready to test without sourcing additional parts.
Use the equipment you already have — Adaptable to most standard universal testing instruments, protecting your existing investment in test equipment.

Applications

Plastic film and sheeting friction testing for quality control, incoming material inspection, and R&D
Tensile-mode coefficient of friction testing (not intended for high-rate/high-speed applications)

How It Works

A tow line connects the sled to a low-force load cell, running over a guide pulley. As the crosshead moves, the sled is pulled across the table and the load cell records force throughout the test:

Static coefficient of friction is calculated from the first force peak on the load curve
Kinetic coefficient of friction is calculated from the average force between two defined points
Coefficient of friction = recorded force ÷ sled mass

Specifications

Specification	Detail
Standards	ASTM D1894, ISO 8295
Table Description	Rectangular metal table, defined surface finish
Table Width	152.4 mm (6.0 in)
Table Length	514.3 mm (20.25 in)
Table Effective Length	109.5 mm (4.3 in)
Sled Description	Metal sled wrapped in 1/8 in (3.2 mm) thick foam pad
Sled Width	63.5 mm (2.5 in)
Sled Length	63.5 mm (2.5 in)
Sled Weight	200 g (7 oz)
Tow Lines Included	Nylon and metal
Load Cell Connection Upper Fitting	Includes: Type Cm (1/4 in Clevis Pin), Type Bm (3/16 in Clevis Pin), Type Om (6 mm Clevis Pin)
Frame Mounting Lower Fitting	Instron 1/2 in Clevis Pin (Type Dm)

Frequently Asked Questions (FAQs)

What testing standards does the 2810-005 support?

The Instron Coefficient of Friction Fixture is designed to test in accordance with ASTM D1894 and ISO 8295, the two most widely used standards for measuring static and kinetic coefficient of friction in plastic film and sheeting.

Will this fixture work with the testing system I already have?

Can I test both sides of my material in one setup?

Is this fixture suitable for high-speed friction testing?

What is coefficient of friction testing and why does it matter for plastic film?

Coefficient of friction (COF) testing measures how easily one surface slides against another — in this case, how easily plastic film or sheeting slides against itself or another material. It matters because friction affects how film behaves in real-world use: too much friction can cause jamming or tearing during high-speed packaging and manufacturing processes, while too little can cause slipping, poor stacking stability, or product mishandling. Manufacturers test COF to ensure film performs consistently on packaging lines, in shipping, and in end-use applications.

What's the difference between static and kinetic coefficient of friction?

Static coefficient of friction measures the force needed to start moving one surface against another from a resting position — essentially, how much resistance there is to overcome before sliding begins. Kinetic (or dynamic) coefficient of friction measures the force needed to keep the surfaces moving once sliding has already started. Static friction is typically higher than kinetic friction, and both values matter for different reasons: static friction relates to how film behaves when stationary (like on a stack or roll), while kinetic friction relates to how it behaves once in motion (like running through packaging equipment).

What equipment do you need to test coefficient of friction on plastic film?

At minimum, you need: a universal testing system (or equivalent frame) capable of controlled, constant-speed horizontal pulling; a coefficient of friction fixture, which includes a weighted sled and a flat test table or plate; a load cell sensitive enough to accurately capture low-force readings; and a tow line connecting the sled to the load cell. You'll also need testing software to run the test and calculate results — Instron's Bluehill® Universal software includes a pre-built ASTM D1894 test method, so you can start testing right out of the box or customize it to match your specific procedure.

Talk to an Instron Expert.

Nor sure if this fixture fits your test requirements? Our application engineers can help you match the right fixture to your testing standard and film or sheet type.

Resources

Testing Systems » Structural Durability Testing Systems » Structural Durability Products » Labtronic EVO Controller

Labtronic EVO^®

Because decisions for the future are made today

Instron Labtronic EVO® LINK decentralized actuator-level measurement module shown from two angles

Instron Labtronic EVO® CORE controller unit shown in front and isometric views

Instron Labtronic EVO® SAFE safety system enclosure, ISO 13849-1/2 compliant, shown in isometric and front views

Instron Labtronic EVO® 24-10 power distribution and I/O module shown in isometric and front views

Two lab equipment enclosures with glass doors, red frames, and a white top, shown in perspective view (Instron Labtronics EVO).

Labtronic EVO is a modular, scalable controller solution designed for modern servohydraulic applications and test systems, combining flexibility, performance, and future-proof upgradeability. Built on a distributed architecture, it replaces traditional centralized systems to reduce cabling, improve signal quality, and simplify installation.

The platform consists of five integrated components:

Labtronic EVO CORE (real-time control with EtherCAT connectivity)
Labtronic EVO MAIN (protected housing)
Labtronic EVO 24-10 / 24-20 (24 V power distribution with I/O and network extension)
Labtronic EVO LINK (decentralized actuator-level measurement and valve control with CAN bus)
Labtronic EVO SAFE (ISO 13849-1/2 compliant safety system)

With electronics placed close to actuators, Labtronic EVO enables shorter analog paths, faster setup, and reduced downtime of up to 80% in certain configurations. Backward compatibility and stepwise upgrade options allow seamless integration into existing test rigs, making it a powerful platform for new installations and modernization projects.

Ready to learn more? Download the Labtronic EVO brochure for full technical details.

Download The Brochure

Instron Labtronic EVO® LINK module mounted directly on a servo-hydraulic actuator

Key Features

Modular architecture enabling scalable and flexible test system design
Decentralized system design with actuator-level integration via EVO LINK for shorter analog signal paths
High-speed EtherCAT communication (10 kHz) for deterministic real-time control and low-latency data exchange
Integrated multi-function EVO LINK module with measurement amplifiers, valve control, and CAN bus interfaces (CAN 2.0 A/B, CAN FD)
Hybrid cabling and daisy-chain connectivity supporting up to eight EVO LINK modules for simplified installation
Stepwise upgrade capability and backward compatibility with Labtronic^® 8800ml systems for hybrid operation
Advanced safety system (EVO SAFE) compliant with ISO 13849-1/2 Performance Level d

Benefits of Use

Up to 80% reduction in test setup time, significantly lowering downtime and increasing test efficiency
Reduced cabling complexity and faster installation due to decentralized electronics and EtherCAT topology
Improved signal quality and noise immunity from shorter analog cable lengths near actuators
Flexible, future-proof system upgrades that protect existing investments and allow incremental modernization
Minimal disruption during retrofits, as components can be installed alongside existing systems
Faster commissioning and maintenance through hybrid connectors and simplified system architecture
Lower training requirements thanks to familiar software environments (RSLabSite^® 2.n) and backward compatibility

Want to go deeper? Read our interview with Burkhard Bertemes, Instron's Innovation Manager behind the development of the Labtronic EVO.

Read the Article

	Labtronic 8800ml	Labtronic EVO
Real-time performance with EtherCAT (10 kHz)
Support for CAN bus integration
Uses RSLabSite 2.n
Decentralized architecture design
Significantly reduced cabling and setup time
Stepwise upgrade and hybrid compatibility
Integrated standardized safety system

FAQ

What is Labtronic EVO?

Labtronic EVO is a modular, scalable test system for servohydraulic applications that simplifies test rig electronics, reduces cabling, and enables fast upgrades. It combines decentralized architecture, modern bus technology (EtherCAT), and backward compatibility to create a flexible platform for new installations and retrofits.

What components make up the Labtronic EVO system?

The system consists of five core components:

Labtronic EVO CORE – central controller with up to eight control channels and EtherCAT interface
Labtronic EVO MAIN – protective housing for up to three CORE units and a UPS
Labtronic EVO 24-10 / 24-20 – 24 V power distribution with integrated I/O and EtherCAT switch
Labtronic EVO LINK – decentralized actuator-level module for measurement and valve control
Labtronic EVO SAFE – safety system compliant with ISO 13849-1/2 Performance Level d

Together, they form a distributed, high-performance test system.

What problem does Labtronic EVO solve?

How does the decentralized architecture improve performance?

What is special about the Labtronic EVO LINK module?

How much downtime reduction can be achieved?

How easy is it to upgrade or retrofit existing systems?

Is Labtronic EVO compatible with existing systems?

What communication and bus technologies are used?

How does Labtronic EVO support long-term system evolution?

Resources

Testing Accessories » Extensometers » Biaxial and Averaging Axial Clip-On Extensometers

Instron^® biaxial and averaging axial clip-on extensometers are typically used for testing advanced composites, rigid plastics, and metals. In all of these extensometers, average axial strain is determined from independent strain measurements from both sides of the specimen. The use of average axial strain corrects for any specimen bending due to misalignment for a consistent and accurate determination of modulus.

By integrating a transverse strain transducer, the extensometer can simultaneously measure average axial and transverse strain, allowing the determination of Poisson’s ratio and in-plane shear strain. With a robust design, these extensometers provide reliable operation under demanding conditions and can be used in temperatures ranging from -200°C to +200°C (-328°F to +392°F).

These extensometers meet the calibration requirements of ASTM E83 B-1, ISO 9513 Class 0.5, and ISO 527 (Annex C).

Averaging axial clip-on extensometer for composites testing

Biaxial extensometer testing a plastic specimen

Biaxial Clip-On Extensometers

Single Average Axial Strain Output Models

Axial Gauge Length	Axial Strain	Catalog Number
25 mm	-2% to +5%	2650-561
50 mm	-1% to +2.5%	2650-563
1 in	-2% to +5%	2650-565
2 in	-1% to +2.5%	2650-567

Two Independent Axial Strain Output Models

Axial Gauge Length	Axial Strain	Catalog Number
25 mm	-2% to +5%	2650-571
50 mm	-1% to +2.5%	2650-573

View Data Sheet

Biaxial extensometer with advanced hydraulic wedge grips

Averaging Axial Clip-On Extensometers

Averaging axial clip-on extensometers measure axial strain on opposite sides of the specimen. These models provide a single averaged axial strain output.

Axial Gauge Length	Axial Strain	Catalog Number
25 mm	-2% to +5%	2650-560
1 in	-2% to +5%	2650-564

View Data Sheet

Not sure which extensometer is right for your application?

Ask Our Applications Experts

Testing Accessories » Environmental Chambers and Furnaces » Furnaces » Furnace Testing for Fatigue Testing Systems

Instron's furnace accessories for fatigue testing systems support elevated temperature testing up to 1000°C in air, including low cycle fatigue, hot tensile, and reverse axial stress applications. Standard configurations include a three-zone split tube furnace with side entry extensometer port and hydraulic reverse-stress pull rods rated to 1050°C. For testing requirements beyond standard temperature ranges or dimensions, Instron's Engineered Solutions Group can develop custom configurations to meet your specific needs.

1000°C Three-Zone Split Tube Furnace

Catalog No. (Various)

Designed for low cycle fatigue testing, this three-zone split tube furnace features durable embedded heating elements, high efficiency insulation, and a side entry extensometer port.

Related Accessories
Description	Catalog No.
Furnace Controller and Software	3117-301

Hydraulic Reverse-Stress Pull Rods

Catalog No. 3117-501

Designed for elevated temperature low cycle fatigue applications in addition to hot tensile testing and other reverse axial stress applications.

Specifications
Maximum Pressure	130 bar
Maximum Operating Temperature	1050°C (1922°F)

Related Accessories
Description	Catalog No.
Electrically Operated Pump	3117-503

Extensometers

Testing Accessories » Extensometers

An extensometer is a precision instrument used in materials testing to measure the deformation (strain) of a specimen under applied load. It detects small changes in gauge length — the defined distance between two reference points on the specimen — and converts that displacement into strain data. Extensometers are used in tensile, compression, and flexure testing to generate accurate stress-strain curves and determine mechanical properties such as Young's modulus, yield strength, and elongation at break.

Quick Links to Products

Non-Contacting Video Automatic Contacting Clip-Ons Long Travel High-Temp Other

Choosing the Right Extensometer

Selecting the right extensometer depends on your material, specimen geometry, test standard, and throughput goals. The three main types Instron offers each have distinct advantages — use the guide below to identify the best fit for your application.

Most Common

Clip-On Extensometers

Mechanical extensometers that clip directly onto the specimen via knife-edges or pivot arms. They measure strain by detecting changes in gauge length through a strain gauge or LVDT sensor.

Best For

Low-Volume Testing | Poisson's Ratio | High-Temperature | Rigid Materials

Key Considerations

High accuracy across a wide strain range
Works with standard flat and round specimens
Cost-effective for low-volume labs
May need to be removed before specimen fracture to avoid damage
Not suitable for very thin or delicate specimens

Go To Clip-Ons

Automated

Automatic Contacting Extensometers

A motorised extensometer that automatically attaches to and releases from the specimen, enabling high-throughput testing without manual handling between specimens.

Best For

High-Throughput | Automated Test Systems | Axial and Transverse

Key Considerations

Eliminates manual attachment — reduces operator fatigue and error
Optional auto-detach before fracture
Consistent positioning across all specimens
Less convenient to move between testing systems compared to clip-ons
Not compatible with temperature chambers

Go To Automatic Contacting

Most Versatile

Non-Contacting Extensometers

Video extensometers are camera-based systems that optically track gauge marks or contrasting features on the specimen surface, measuring strain without any physical contact.

Best For

Key Considerations

No contact — no influence on specimen behavior
Single device suitable for almost any material
Can measure axial and transverse strain simultaneously
Requires good contrast between gauge marks and specimen

Go To Non-Contacting

Quick Selection Guide

If your requirement is…	Recommended extensometer type
Testing thin films or fragile materials that a clip-on would damage	Video extensometer
High‑throughput automated test cell with minimal operator involvement	Automatic contacting or video extensometer
Measuring both axial and transverse strain	Automatic contacting or video extensometer
Tight budget with moderate throughput on standard specimens	Clip‑on extensometer
Specimens that fracture explosively (i.e. composites)	Video extensometer
Complying with ASTM or ISO standards	See our FAQ below

Find the Right Extensometer for Your Test

Non-Contacting Video Automatic Contacting Clip-Ons Long Travel High-Temp Other

Non-Contacting Video Extensometers

A video extensometer is a camera-based extensometer that optically tracks gauge marks or contrasting features on the specimen surface to measure strain without physical contact. Capable of measuring strain on almost any material, video extensometers are particularly well suited for soft, delicate, or highly compliant materials where contact would influence the specimen's behavior or damage the device.

Recommended Use Cases

Common Standards

ISO 527-2 | ASTM D638 | ISO 37 | ISO 178 | ASTM D882 | ASTM D412 | ISO 6892-1 | ASTM E8/E8M | ASTM A370 | ASTM E345 | ASTM D3039 | ISO 527-4 | ISO 527-5

Materials and Industries

Available Models

For Universal Testing Systems

AVE3 Advanced Video Extensometer

Instron's highest-performance video extensometer for universal testing machines, designed for demanding applications and advanced materials research requiring the highest levels of accuracy and repeatability.

Features & Capabilities

Patent-pending CDAT airflow technology for up to 5× accuracy improvement
Supports closed-loop strain control
Single-point or optional averaged transverse strain measurement
Digital image correlation (DIC) capable for full field strain and displacement mapping
500 Hz data capture rate

AVE3

For Universal Testing Systems

Instron SVE3 video extensometer mounted on a universal testing system measuring strain on a thin metallic specimen held between two wedge-action grips

SVE3 Standard Video Extensometer

Instron's standard video extensometer for universal testing machines, delivering reliable and accurate non-contact strain measurement for everyday materials testing and research applications.

Features & Capabilities

Patented cross-polarized lighting technology reduces errors from lighting fluctuations
On-board measurement technology processes data in real-time
Allows for testing at ambient, high, and low temperatures
200 Hz data capture rate
Does not support strain control, transverse strain, or digital image correlation (DIC)

SVE3

AutoX750 Automatic Contacting Extensometer

Automatic Contacting Extensometers

An automatic contacting extensometer is a motorized strain measurement device that automatically attaches to and detaches from the specimen under software control, eliminating manual handling between tests. It can be configured to remain on the specimen through fracture or to retract before failure, protecting the sensor where the test warrants it. Suited to high-throughput production testing and automated test cells where consistency, operator safety, and cycle time are critical.

Recommended Use Cases

Common Standards

Materials and Industries

Plastics | Metals | Composites | Elastomers

Available Models

For Universal Testing Systems

AutoX750 Axial Automatic Contacting Extensometer

Instron's automatic contacting extensometer for universal and static hydraulic testing systems, delivering high-accuracy axial strain measurement with automatic gauge length positioning for high-throughput metals, plastics, and composites testing.

Features & Capabilities

Automatic arm attachment and gauge length positioning eliminates manual setup between specimens
Arms can remain on specimen through failure or be configured to detach beforehand
Closed-loop strain control compliant with ISO 6892-1 Method A1 and ASTM E8 Method B
Meets ISO 9513, ASTM E83, and ISO 527-1 accuracy requirements

AutoX750

For Universal Testing Systems

Thin metallic specimen secured in wedge-action grips on an Instron universal testing system with the Instron AutoXBiax extensometer attached for biaxial strain measurement during tensile testing

AutoXBiax Biaxial Automatic Contacting Extensometer

Instron's automatic biaxial contacting extensometer for universal testing systems, combining all the capabilities of the AutoX750 with simultaneous transverse strain measurement — enabling axial strain and plastic strain ratio (r-value) to be captured in a single test.

Features & Capabilities

Includes all features from AutoX750, plus:
Simultaneous axial and transverse strain measurement — no separate transverse extensometer required
Automatic centering improves repeatability by positioning in the center of your gauge length
Determine plastic strain ratio (r-value) in sheet metals to ISO 10113, ASTM E517, and JIS Z 2254

AutoXBiax

Clip-On Extensometers

Clip-on extensometers attach directly to the specimen via spring-loaded knife-edges, offering a precise and cost-effective solution for strain measurement across a wide range of materials and test types. Instron's clip-on range spans static and dynamic axial, averaging, biaxial, and transverse configuration — covering everything from routine static tensile testing through to high-cycle fatigue, compression, flexure, and full material characterization requiring simultaneous multi-axis strain measurement.

Recommended Use Cases

Low-Volume Testing | Poisson's Ratio | Testing Up to 200°C

Common Standards

ASTM D638 | ISO 604 | ISO 178 | ISO 527-2 | ASTM E8/E8M | ISO 6892-1 | ASTM D3039

Materials and Industries

Plastics | Metals | Composites

Clip-On Extensometer Types

For Universal Testing Systems

Static Axial Clip On Extensometer Testing Metal Round Specimen

Static Axial Clip-On Extensometers

Instron's standard clip-on extensometers for static tensile, compression, and flexure testing, delivering accurate axial strain measurement on metals, rigid plastics, and composites to ISO 6892-1, ASTM E8, and ISO 527.

Static Axial

For Dynamic & Universal Testing Systems

2620 Series Dynamic Axial Clip-On Extensometer

Dynamic Axial Clip-On Extensometers

Instron's clip-on extensometers for cyclic and fatigue testing applications, delivering stable and accurate axial strain measurement over high cycle counts to ASTM E606 and ISO 12106.

Dynamic Axial

For Universal Testing Systems

Averaging Axial and Biaxial Clip-On Extensometers

Instron's averaging and biaxial clip-on extensometers for tensile and compression testing of metals, composites, and rigid plastics, delivering mean axial strain measurement for precise modulus and Poisson's ratio determination.

Averaging & Biaxial

For Universal Testing Systems

Transverse Clip-On Extensometers

Instron's transverse clip-on extensometers for tensile testing, delivering accurate lateral strain measurement perpendicular to the loading axis for Poisson's ratio determination to ASTM E132 and ISO 527.

Transverse

Long Travel Extensometers

For Universal Testing Systems

Designed to measure strain across very large displacements, long travel extensometers accommodate materials that undergo significant elongation before fracture — such as rubber and other elastomers. Where a standard clip-on extensometer would bottom out at its maximum travel, a long travel design maintains accurate strain measurement throughout the full test.

Recommended Use Cases

Elastomers | ISO 37 | ASTM D412 | Elongations at Break Exceeding 100% | Ambient Testing Only

Long Travel

High Temperature Extensometer for Testing with a Furnace

High-Temperature Extensometers

For Universal Testing Systems

Designed for use inside furnaces and environmental chambers, high-temperature extensometers measure strain on specimens tested at elevated temperatures — up to 1200°C. The ceramic probe transmits displacement from the hot specimen to sensors located outside the heating zone, protecting measurement accuracy.

Recommended Use Cases

High-Temperature

Other Extensometers

For Universal Testing Systems

Compression Deflectometers (LVDT)

Instron's LVDT-based deflectometers for compressive property testing, delivering accurate specimen deflection measurement independent of machine compliance on plastics, foams, and composites to ISO 604 and ASTM D695.

LVDTs

For Universal Testing Systems

Flexural Deflectometers

Instron's flexural deflectometer is a spring-loaded plunger used with a clip-on, automatic contacting, or video extensometer to measure specimen deflection during three and four-point bend tests to ISO 178 and ASTM D790.

Flex Deflectometers

For Universal Testing Systems

Crack Opening Displacement Gauges

Instron's COD gauges for fracture mechanics testing, delivering accurate crack opening displacement for fracture toughness determination on metals and structural alloys to BS 7448, ASTM E399, and ASTM E1820.

COD Gauges

For Universal Testing Systems

Bonded Strain Gauge Adapters

Instron's bonded strain gauge adapters for strain gauge-based testing, enabling standard electrical resistance strain gauges to integrate directly with Instron signal conditioning and data acquisition hardware.

Adapters

Why Instron

Instron has been designing and manufacturing materials testing equipment for over 80 years, with extensometers developed and built in-house to the same standards our customers test to. Our engineers are active participants in ASTM and ISO standards committees — giving us direct insight into evolving test requirements and ensuring our equipment meets them from day one.

With one of the largest service and calibration organizations in the materials testing industry, we support customers at every stage — from installation and training through to ongoing verification and recalibration. It is why over 96% of Fortune 100 companies trust Instron equipment in their testing laboratories.

Frequently Asked Questions (FAQs)

Which extensometer does Instron recommend for my test standard?

The table below outlines the extensometer types Instron generally recommends for common test standards. These recommendations are intended as a starting point — the most suitable extensometer for your application will also depend on factors such as throughput goals, lab setup, and specimen geometry. If you'd like a more tailored recommendation, speak to one of our application experts.

Standard	Application	Recommended Extensometer
ISO 6892-1	Tensile Testing of Metals at Ambient Temperature	Recommended: Video or Automatic Contacting Extensometer Acceptable: Clip-On Extensometer
ISO 6892-2 ASTM E21	Tensile Testing of Metals at Elevated Temperature	Recommended: High-Temperature Extensometer
ASTM E8/E8M	Tensile Testing of Metallic Materials	Recommended: Video or Automatic Contacting Extensometer Acceptable: Clip-On Extensometer
ISO 12135 ASTM E399	Fracture Toughness of Metals	Recommended: Crack Opening Displacement Gauge
ISO 527-2 ASTM D638	Tensile Properties of Plastics	Recommended: Video or Automatic Contacting Extensometer Acceptable: Clip-On Extensometer If testing for Poisson's ratio, a transverse or biaxial clip-on extensometer is required.
ISO 178 ASTM D790	Flexural Properties of Plastics	Recommended: Video or Automatic Contacting Extensometer Acceptable: Clip-On Extensometer Each extensometer listed above must be used in conjunction with a flexural deflectometer for this test.
ASTM D3039	Tensile Properties of Polymer Matrix Composites	Recommended: Video Extensometer Acceptable: Clip-On Extensometer or Strain Gauge If testing for Poisson's ratio, a transverse or biaxial clip-on extensometer is required.
ISO 37 ASTM D412	Tensile Properties of Rubber and Elastomers	Recommended: Video Extensometer Acceptable: Long Travel Extensometer

For more detail on individual test standards and extensometer requirements, explore Instron's library of ASTM and ISO standard guides.

When to use an extensometer?

An extensometer should be used whenever accurate strain measurement is required that cannot be reliably inferred from crosshead displacement alone. Crosshead displacement includes contributions from machine compliance, grip seating, and load train deflection — all of which can significantly overestimate true specimen strain, particularly in stiff materials or at low strain values. Extensometers are essential for determining modulus of elasticity, yield strength, and other strain-dependent properties, and are required by most material test standards including ISO 6892-1, ASTM E8/E8M, and ISO 527. As a general rule, if your test result depends on an accurate stress-strain curve, an extensometer should be used.

What is gauge length and how do I choose the right one?

Gauge length is the defined reference distance between the two contact points of an extensometer on an unstrained specimen. Strain is calculated as the change in that length divided by the original gauge length. Many test standards specify a required gauge length relative to specimen dimensions — for example, ISO 6892-1 typically uses a proportional gauge length of 5.65√S₀. Selecting the correct gauge length for your specimen and standard is essential for producing compliant, comparable results.

Can I leave an extensometer on the specimen through fracture?

Whether to remove an extensometer before fracture depends on the material and how it fails. For ductile materials with gradual failure, the extensometer can generally remain on through fracture. For brittle or high-strength materials that fail explosively, the energy released at break can damage the device — in these cases removal before failure is recommended. With standard clip-on extensometers this typically requires pausing the test to remove the device manually before proceeding. The AutoX750 and AutoXBiax can be configured to retract automatically at a defined threshold, removing the need to interrupt the test, and video extensometers require no removal as they maintain no physical contact with the specimen.

What extensometer do I need for testing rubber or elastomers?

Rubber and elastomers undergo very large deformations — often 500–1000% strain — which rules out most standard clip-on extensometers due to their limited travel range. For these materials, a video extensometer is a popular choice, tracking two dots applied to the specimen surface optically with no physical contact, no influence on material behavior, and no risk of sensor damage through to fracture. Instron's XL Long Travel extensometer is also a viable option, offering up to 750mm of mechanical travel, though it is a more straightforward solution compared to the flexibility and measurement range a video extensometer provides. Both approaches are consistent with ISO 37 and ASTM D412 requirements for tensile testing of vulcanized rubber and elastomers.

How is an extensometer calibrated and what accuracy class do I need?

Extensometers are calibrated and classified to ISO 9513 (internationally) or ASTM E83 (US), which define accuracy classes — such as Class 0.5, Class 1, and Class 2 — specifying permissible errors across the measurement range. The class required for your test is typically specified by the relevant material test standard. For example, ISO 6892-1 requires Class 1 or better for most applications. Instron extensometers are supplied with calibration certificates traceable to national standards, with recalibration services available to maintain ongoing compliance.

What is the difference between an axial and a transverse extensometer?

An axial extensometer measures strain along the loading axis — the primary direction of deformation in a tensile or compression test. A transverse extensometer measures strain perpendicular to the loading axis, capturing the reduction in width or diameter as the specimen is stretched. Used together, axial and transverse measurements allow calculation of Poisson's ratio — the ratio of lateral to axial strain. Instron offers several ways to capture both simultaneously in a single test: dedicated transverse clip-on extensometers paired with an axial device, biaxial and averaging clip-on configurations, the AutoXBiax automatic contacting extensometer, and AVE3 video extensometer, which can measure axial and transverse strain optically without any physical contact with the specimen.

What is an automatic contacting extensometer and when should I use one?

An automatic contacting extensometer attaches to and detaches from the specimen automatically under software control, eliminating manual handling between tests. It is the ideal choice for high-throughput production testing environments and automated test cells where minimizing cycle time, reducing operator variability, and maintaining consistent gauge length positioning are priorities. Instron's AutoX750 and AutoXBiax are compatible with a wide range of universal and static hydraulic testing systems and fully integrate with Bluehill software for seamless test control.

Can one extensometer be used across multiple gauge lengths and materials?

It depends on the extensometer type. Clip-on extensometers are typically fixed to a specific gauge length — labs testing to multiple standards or specimen geometries will generally need separate devices for each gauge length. Video extensometers are the most flexible option, capable of measuring across a wide range of gauge lengths, elongations, and material types without any hardware changes — the device optically tracks two dots applied directly to the specimen surface, so gauge length is simply determined by dot placement. The AutoX750 supports automatic gauge length positioning within its travel range, making it well suited to labs testing a variety of specimen dimensions without manual adjustment between tests.

What is the difference between a strain gauge and an extensometer?

Both devices measure strain, but they work in fundamentally different ways. A strain gauge is a small resistive element bonded directly to the specimen surface — as the material deforms, the gauge deforms with it, changing its electrical resistance in proportion to strain. Proper installation requires a skilled technician: surface preparation, precise adhesive application, and correct wiring are all critical to getting reliable data. An extensometer is a separate instrument that measures the change in distance between two defined points on the specimen, either through mechanical contact or optical tracking.

Strain gauges are well suited to measuring strain at a specific point on a structure or complex geometry. Extensometers, however, are the standard choice for materials testing where a defined gauge length, easy setup between tests, and compliance with test standards such as ISO 9513 and ASTM E83 are required — without the preparation time or specialist expertise that strain gauges demand.

What are common extensometer errors?

The most common sources of extensometer error include incorrect gauge length setting, inconsistent knife-edge placement on the specimen, and slippage of the contact points during the test — all of which introduce variability into strain measurements. For clip-on extensometers, insufficient or excessive clamping force can cause the device to slip or influence the specimen's behavior. Misalignment between the extensometer and the loading axis can introduce bending errors, particularly in compression testing — averaging extensometers are specifically designed to compensate for this. Environmental conditions, particularly temperature fluctuation and airflow in the vicinity of the specimen, can affect image stability and introduce error in video extensometer measurements. Instron's AVE3 video extensometer incorporates integrated lighting and airflow management technology designed to reduce the impact of these variables on measurement accuracy. Regular calibration to ISO 9513 or ASTM E83 is the most effective way to identify and correct systematic errors.

Does an extensometer measure true or engineering strain?

Extensometers measure engineering strain — the change in gauge length divided by the original gauge length. Engineering strain is the standard output required by most material test standards, including ISO 6892-1 and ASTM E8/E8M, and is sufficient for most materials testing applications where deformations are relatively small. True strain, which accounts for the continuously changing gauge length as the specimen deforms, can be calculated from engineering strain values in post-processing if required. For large deformation testing — such as elastomers or highly ductile metals — the difference between engineering and true strain becomes more significant and should be considered when interpreting results.

Not sure which extensometer is right for your application?

Ask Our Applications Experts

SVE3 Standard Video Extensometer

Non-Contact Strain Measurement for Routine Testing

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SVE3 vs. AVE3 Comparison

Data Sheet

FAQs

The SVE3 Standard Video Extensometer is a non-contact strain measurement solution designed for routine materials testing. It can be configured to meet ISO 9513 Class 1 and ASTM E83 Class B-1* and B-2 requirements, and supports a wide range of standard applications involving elastomers, plastics, films, and metals.

With multiple field‑of‑view lens options, the SVE3 adapts easily to different gauge lengths, elongation ranges, specimen geometries, and test environments. By eliminating physical contact with the specimen, it removes common sources of error such as slippage, operator influence, and damage at break — delivering more consistent results across labs.

While the AVE3 is Instron’s most advanced video extensometer for demanding applications, the SVE3 is built on a shared core platform and applies a focused feature set optimized for standard strain measurement requirements and routine testing workflows.

¹ For gauge lengths greater than 30 mm

Key Benefits

Non-contact strain measurement eliminates slippage, operator influence, and specimen damage
Designed for everyday testing with consistent, repeatable results across labs
Flexible lens options support a wide range of gauge lengths and elongations
Reliable performance in ambient and temperature‑controlled testing
Seamless Bluehill^® Universal integration with real‑time data processing

Application Range

Materials: Elastomers, plastics, films, and metals

Loading types: Tensile, compression, and bend

Standards: ASTM D412, ISO 37, ASTM D638, ISO 6892, ASTM E8/E8M, and more

Test environments: Ambient, high‑, and low‑temperature conditions

System compatibility: Works with nearly any Instron testing system

SVE3 vs. AVE3 Comparison

Standard vs. Advanced Video Extensometry

	SVE3 Standard Video Extensometer	AVE3 Advanced Video Extensometer
Lenses - 4 Field of View Options Factory‑configured, self‑identifying lenses ensure fast setup and consistent strain measurement.
Patented Dynamic Cross‑Polarizing Lighting Automatically optimizes illumination for clear, reliable specimen mark tracking.
CDAT Airflow Technology (Patent Pending) Reduces environmental disturbances to improve measurement accuracy and data stability.
Strain Rate Control Supports closed‑loop strain control compliant with ISO 6892 and ASTM E8/E8M.
Transverse Capabilities Single point transverse strain or averaged transverse — recommended for r-value determination per ISO 10113 and ASTM E517
Digital Image Correlation (DIC) Record images in software for full-field strain maps of your specimens that are synchronized with your Bluehill^® Universal test data
Data Capture Rate High‑speed data capture ensures accurate strain measurement during dynamic testing.	200 Hz	500 Hz

If your testing requires advanced control, higher data capture rates, or enhanced accuracy, Instron recommends the AVE3 Advanced Video Extensometer.

Explore AVE3

Frequently Asked Questions (FAQs)

What types of materials can the SVE3 be used to with?

The SVE3 is commonly used to measure strain in elastomers, plastics, films, and metals, making it suitable for a wide range of routine laboratory tests.

What testing standards does the SVE3 meet?

What is the difference between the SVE3 and the AVE3?

The AVE3 Advanced Video Extensometer is designed for the most demanding strain measurement applications, while the SVE3 Standard Video Extensometer is optimized for everyday testing needs.

Compared to the SVE3, the AVE3 offers several advanced capabilities. These include patent‑pending CDAT airflow technology, which minimizes environmental disturbances to improve measurement accuracy and repeatability, as well as support for closed‑loop strain control to meet ISO 6892 and ASTM E8/E8M testing requirements. The AVE3 also provides a higher data capture rate, making it better suited for dynamic tests and advanced materials research.

The SVE3 delivers reliable non‑contact strain measurement for routine applications, while the AVE3 is the preferred choice when testing conditions, standards compliance, or material behavior demand the highest level of performance and control.

What are the advantages of non-contact video extensometry?

What types of tests can be performed with the SVE3?

Can the SVE3 be used in temperature‑controlled testing?

What lens options are available for the SVE3?

The SVE3 offers multiple field‑of‑view lenses, allowing it to accommodate different specimen sizes, gauge lengths, and elongation ranges without changing extensometer types.

Available lenses:

35 mm (Short Field of View)
Suitable for low-strain materials such as metals, and rigid or filled plastics.
16 mm (Standard Field of View)
Suitable for materials such as plastics, metals, sheet metals, and foils.
6 mm (Extra-Long Field of View) and 9 mm (Long Field of View)
Suitable for materials with high elongations such as rubbers, elastomers,
films, and some plastics.

See How the SVE3 Can Optimize Your Strain Measurement

Request a Demo

Resources

SVE3 Standard Video Extensometer Data Sheet Cover Page

Testing Accessories » AVE3 Advanced Video Extensometer » Reliable Strain Measurement — Without Contact

Reliable Strain Measurement — WITHOUT Contact

Non‑contacting extensometry gives labs a faster, safer, and highly versatile way to capture strain — while still meeting the strict accuracy requirements of today’s test standards. It is a confident, modern alternative to clip‑on extensometers for labs looking to streamline workflows and reduce equipment handling.

Go Non-Contacting

A Standards Compliant Alternative to Clip-Ons

Clip on extensometers remain trusted and widely used — and for good reason. But many labs now choose non-contacting solutions because they offer equivalent standards compliance with significant workflow advantages.

The AVE3 Advanced Video Extensometer meets ISO 9513 and ASTM E83 requirements, making it a fully compliant replacement for clip ons in most testing programs.

You’re not compromising accuracy — you’re simplifying how you achieve it.

“The AVE3 has streamlined our workflow by eliminating the need to manage a separate contact extensometer for each gauge length...helping us improve turnaround time, increase testing speed, and offer more competitive pricing to customers.”

Read the Full Case Study

Why Labs Are Confident Going Non-Contacting

Broad Range with One Device

Supports small to large gauge lengths, low to high elongations, and diverse materials including plastics, metals, composites, biomaterials, and films.

Meets Global Standards

A single device satisfies ISO 9513 and ASTM E83 requirements, reducing the need for multiple clip-on devices.

Safe Through Failure

Because it never touches the specimen, the AVE3 can measure strain all the way through break without equipment risk.

Faster, Touch-Free Strain Measurement

No attachment, no alignment, no removal — simply mark the specimen and run the test.

Low Maintenance

No knife edges, no wear surfaces, and no moving parts to manage.

Why Choose the AVE3

The AVE3 Advanced Video Extensometer delivers the accuracy labs expect, combining non‑contact measurement flexibility with expanded strain visualization and analysis capabilities.

Micron-level strain measurement for tensile, compression, and bend testing

500 Hz real-time strain measurement for high-speed test applications

Optional AverEdge32™ averaging improves transverse strain repeatability and r‑value determination

Optional digital image correlation (DIC) enables full-field strain and displacement mapping

Your Workflow, Your Choice

Clip-on and non-contacting extensometers have their place — but if your priority is efficiency, versatility, and consistency, non-contacting offers a clear path forward.

PRIORITY	CLIP-ON	NON-CONTACTING VIDEO
ISO 9513 / ASTM E83 COMPLIANCE	Compliant	Compliant
SETUP SPEED	Manual steps required	Immediate, no attachment setup
FAILURE BEHAVIOR	May require removal before break	Safe through failure
GAUGE LENGTH RANGE	Multiple devices often needed	One device, wide coverage

Test With Confidence — and WITHOUT Contact

The AVE3 gives labs a standards compliant, low-maintenance alternative to clip-ons — with the speed and safety of a fully non-contacting workflow.

Streamline Your Strain Measurement — Talk to Us About the AVE3

Explore the AVE3 Further

Testing Accessories » Environmental Chambers and Furnaces » Furnaces » Furnaces for Universal Testing Systems

Our standard furnaces, mounts, grips, and load‑string assemblies for universal testing systems support high‑temperature testing up to 1200°C in air, providing stable thermal performance and reliable load transfer for a wide range of materials. For applications requiring temperatures beyond this range or unique furnace dimensions, our Engineered Solutions team can develop customized high‑temperature systems tailored to your specific testing needs.

Furnace 3119-160 Three-Zone Split Tube Furnace with High Temperature Extensometer

68FM Universal Testing System with Dual Furnaces

1200°C Three-Zone Split Tube Furnace

Catalog No. 3119-160

This three-zone split tube furnace features a side entry extensometer port and is manufactured with a wire-wound element for maximum operation up to 1200°C (2200°F). The elements are uniquely formed to provide optimum temperature uniformity, ensuring conformance with testing standards such as ASTM E21, ISO 6892-2, EN10002-5,and EN2002-2. The top and bottom furnace endplates are durable, provide excellent insulation, and include a 20 mm (0.787 in) diameter hole for use with pull rods.

Specifications
Specimen Temperature Range	200 - 1050°C (392 - 1922°F)
Overall Heated Length	300 mm (11.81 in)
Interior Diameter	75 mm (2.95 in)

Mounting Brackets

Mounting brackets are used to securely attach the furnace to the test system.

Specifications
Description	Catalog No.
Floor Model Standard Furnace Mounting A standard 3-knuckle design furnace mounting that allows for manual adjustments.	CP119938
Floor Model Advanced Furnace Mounting The advanced mounting allows for quick and easy fine adjustments of the vertical position of the furnace as well as parallelism to the load string.	CP107737

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Three-Zone Temperature Control Systems

Temperature control systems are designed for controlling the heat output of furnaces. The control systems can be configured to operate nearly any furnace with any one of several different thermocouples types. Three zone control systems are designed for heat-only furnaces with three separate zones of heating elements, and typically three different thermocouples to control those zones.

Specifications
Description	Catalog No.
Type K Control System	3119-960
Type R/S Control System	3119-962
Stepdown Transformer The wall mount 3KVA stepdown transformer assembly provides the ability to operate the 120V, single phase Model TCS3203 3-zone furnace control system from 190/200/208/220V, 50/60Hz power sources.	W-C015-TRAN

Quick-Change Adapters

Quick-change adapters are typically used in hot tensile applications to provide simplified load train installation. They consist of a button-head washer that is threaded onto the room temperature end of a pull rod. The washer and pull rod are then inserted through a slot in the adapter body.

Specifications
Force Capacity	Effective Length	Catalog No.
90 kN	6.43 in	W-7556M4
10 kN	5.58 in	W-7556M2

Threaded End Specimen Holders

Catalog No. W-7551-C

Threaded-end specimen holders made of Inconel 713-C rated for a maximum temperature of 1100 Deg. C (2000 Deg. F).

Specifications
Specimen Thread Size	Catalog No.
Metric M6 x 1.0	W-7551-CM1
Metric M8 x 1.0	W-7551-CM2
Metric M8 x 1.25	W-7551-CM3
Metric M10 x 1.5	W-7551-CM4
Metric M12 x 1.5	W-7551-CM5
Metric M12 x 1.75	W-7551-CM6
Metric M14 x 2.0	W-7551-CM7
Metric M16 x 1.5	W-7551-CM8
Metric M16 x 2.0	W-7551-CM9
Metric M18 x 2.5	W-7551-CM10
Metric M19 x 1.5	W-7551-CM11
US Customary 10-24	W-7551-CU1
US Customary 10-32	W-7551-CU2
US Customary 1/4-20	W-7551-CU3
US Customary 1/4-28	W-7551-CU4
US Customary 5/16-24	W-7551-CU5
US Customary 5/16-18	W-7551-CU6
US Customary 3/8-16	W-7551-CU7
US Customary 3/8-24	W-7551-CU8
US Customary 7/16-14	W-7551-CU9
US Customary 1/2-13	W-7551-CU10
US Customary 5/8-11	W-7551-CU11
US Customary 3/4-10 (Type R3f)	W-7551-CU12

High-Temperature Tension Wedge Grips

Catalog No. W-7554

One set (2) wedge grip specimen holders made of Hastelloy X. Holders designed for tension-only loading and may be equipped to accept flat specimens from 1.13 mm to 3.18 mm thick (0.005 in to 0.125 in) by 12.7 mm to 22.225 mm wide (0.5 in to 0.875 in). Design of holders requires drilling of holes in specimen end tabs for initial loading and jaw alignment. Centering pin diameter 4.1148 mm (0.162 in). Holders are 70mm (2.75 in) long by 38mm (1.375 in) diameter contain 0.75-10f-RH thread for attachment to pull rods. Jaw inserts ordered separately, selected based on thicknesses of specimens to be tested. See W-7554-A1, -A3, and -A4 below for available inserts and corresponding thickness ranges.

Specifications
Specimen Diameter	Pin 4.1148 mm (Pin 0.162 in)
Specimen Thickness	1.13 - 3.18 mm (0.005 - 0.125 in)
Specimen Width	12.700 - 22.225 mm (0.500 - 0.875 in)
Temperature Rating	926°C (1700°F)

High-Temperature Wedge Jaw Inserts

One set (two pairs) of high temperature wedge jaw inserts for use with the W-7554 high-temperature tension wedge grips.

Specifications
Type	Specimen Thickness	Temperature Rating	Catalog No.
Smooth-Faced	0.13 to 1.0 mm (0.005 to 0.040 in)	926°C (1700°F)	W-7554-A1
Serrated-Faced	1.0 to 2.0 mm (0.040 to 0.078 in)	926°C (1700°F)	W-7554-A3
Serrated-Faced	2.0 to 3.18 mm (0.078 to 0.125 in)		W-7554-A4

Pin and Clevis Specimen Holders

Pin and clevis specimen holders are designed for flat specimens that have a hole in each end. The specimen fits into the slot of the holder and is secured by the pin.

Note: Using a specimen that is smaller (thinner) than the slot width specified for a given set of holders can result in misalignment of the specimen.

Specifications
Material	Iconel 713-C
Temperature Rating	1100°C (2000°F)
Upper and Lower Fittings	US Customary 3/4 in-10 (Type R3f)
Coupling Length	69.9 mm (2.75 in)
Coupling Diameter	28.6 mm (1.125 in)

Available Sizes
Size	Catalog No.
1 mm slot, 3 mm pin	CP112249
2 mm slot, 3 mm pin	CP112250
3 mm slot, 4 mm pin	CP112251
4 mm slot, 4 mm pin	CP112252
6 mm slot, 6 mm pin	CP112253
10 mm slot, 10 mm pin	CP112255

Testing Accessories » Tensile Grips » Fatigue Rated Mechanical Wedge Action Tensile Grips

Fatigue Rated Mechanical Wedge Action Tensile Grips

Instron mechanical wedge action grips may be used in static or dynamic materials testing applications, interchangeable wedge-shape grip faces accommodating either flat or round specimens.

The grip is designed to allow test specimens to be securely gripped without introducing axial pre-loading to the specimen. This is achieved by using jaw faces that move in a horizontal direction only, relative to the specimen.

Principle Of Operation

Each grip is mechanically operated, gripping force being applied via movement of the grip body relative to the wedge shaped jaw faces. This movement is induced by the tightening of four socket cap screws on the underside of the grip head.

Each jaw face is located in the grip body by two extension springs, which allow the jaw faces to release the specimen after testing.

The grip body wedge area is fitted with jaw guides, to ensure that the jaw faces remain square to each other and to the specimen.

Products

Item Name	Cat#
Fatigue Rated Mechanical Wedge Grips (+/- 100 kN)	2743-402
2742-102 ±1 kN Mechanical Fatigue Grips	2742-102
2742-316 ±10 kN ±100 Nm Mechanical Fatigue Grips	2742-316
2742-206 ±3 kN ±25 Nm Mechanical Fatigue Grips	2742-206

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