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Extensometers for materials testing

High Temperature Diametral Extensometers (1000 °C) – Model 3580

For transverse or diametral strain measurements at temperatures to 1000 °C (1832 °F). These extensometers may be used with furnaces having a side entry slot for an extensometer or with induction heating systems. They utilize a proprietary, rugged dual flexure design.

Epsilon extensometers are COMPATIBLE WITH VIRTUALLY EVERY BRAND OF TEST EQUIPMENT and can be supplied with the correct connector to plug in directly, or supplied with a separate conditioner and amplifier.

WITH EPSILON’S 20+ YEAR HISTORY OF SERVICE to the materials testing community, you know we will be there to stand behind our products when your critical application requires it.

36 EXTENSOMETER MODELS are available in many thousands of variations. Our focus on helping customers has led to the development of models to cover nearly any test method.

This model is for diametral strain measurement with furnace and induction heating systems. Quartz rods and water-cooling allow the unit to be used for high temperature testing of metals, ceramics and composites. With induction heating, this model often can be used without water-cooling.

When used in furnaces, the extensometer is often mounted directly to the furnace side cut-out. Optional load frame mounting brackets are available for supporting the extensometer in cases where furnace mounting is not possible. These optional mounts are used with induction heating or furnace systems.

The Model 3580 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.

Download Data Sheet

  • May be left on through specimen failure.
  • Full bridge, 350 ohm strain gaged design for compatibility with nearly any test system.
  • All standard units have linearity readings of 0.15% or better.
  • Suitable for measuring Poisson’s ratio per ASTM E132 with most materials and specimens.
  • Each unit comes with a spare set of quartz rods, universal water-cooled mounting bracket and a foam lined storage case.
  • Rugged, dual flexure design for strength and improved performance. Much stronger than single flexure designs, this also allows cyclic testing at higher frequencies.
  • Versions available for use in vacuum environments (consult factory).
  • High purity alumina ceramic rods (1200 °C) or alpha grade silicon carbide rods (1600 °C) are available.

Download Data Sheet

Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max.

Output: 2 to 4 mV/V nominal, depending on model

Linearity: ≤0.15% of full scale measuring range, depending on model

Temperature Range: Standard is -40 °C to +1000 °C (-40 °F to 1832 °F)

Cable: Integral, ultra-flexible cable, 2.5 m (8 ft) standard

Specimen Size: Works with sample diameters from 4.5 to 16 mm (0.18 to 0.63 inch)

Contact Force: Adjustable, 100 to 300 g typical

ce-certified

 

Download Data Sheet

  • Special rods are available for large specimens
  • Ceramic rods for testing to 1200 °C or 1600 °C
  • Connectors to interface to nearly any brand test equipment
  • Model 2050 constant temperature water re-circulating bath
  • Shunt Calibration

Download Data Sheet

Ordering Information

Click table options to configure

Measuring Range

extension #
±0.50 mm -050M 050M
±0.75 mm -075M 075M
1.50 mm -150M¹ 150M
2.00 mm -200M¹ ² 200M
5.00 mm -500M¹ ² 500M
±0.020 in -020T 020T
±0.030 in -030T 030T
±0.060 in -060T¹ 060T
±0.075 in -075T¹ ² 075T
±0.200 in -200T¹ ² 200T

Model Number:  3580 – _ _ _

Model Number:

3580 – _ _ _

Model 3580 Available Versions: ANY combination of measuring range and temperature range listed above is available. Quartz rod lengths are made to fit furnaces as required. Please provide furnace and specimen dimensions at the time of order. Other configurations may be available with special order; please contact Epsilon to discuss your requirements.

¹Total measuring range in either tension or compression. Specify direction of extensometer measuring range when ordering.
²Special order only.

Example: 3580-030T: ±0.030 inches measuring range, temperature range of -40 °F to 1832 °F

Download Product Guide

Axial and High Temperature

Shunt Calibration

SCM Shunt Calibration Modules

Knife Edge Options

Available for Epsilon Extensometers

Repairs/Service

If your unit is in need of service, calibration or repair, initiate the RMA process with us and we will be happy to assist.

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Download Catalog

2017 Extensometer Catalog, Version 109 is now available! Not finding something you’re looking for? Ask us about a custom quote.