Phone: 719.694.8040
Fax:   888.809.3867




Our model ETVR is designed to measure the averaged, transverse (lateral) strain at two locations on a sheet metal specimen. It is designed to be easily mounted and self supporting.

The extensometer is designed as two, ganged modules based on our rugged, parallel flexure design. Each module is free to move and remains located on specimen where they were mounted. The signal from each is combined to provide and averaged output signal.

Used for testing to ASTM E517 and ISO 10113, model ETVR can be simultaneously used with a 50 mm or 2.000" gauge length model EAG axial extensometer.

With a full bridge, 350 ohm, strain gaged design, model ETVR is compatible with most test systems and signal conditioning electronics design for strain gage based transducers. Reliant can provide stand-alone electronics to allow the use of data acquisition boards (DAQ), chart recorders or other test equipment.

  • May be left on through specimen failure.
  • Full bridge strain gaged design to ensure compatibility with most any test system.
  • Designed to easily mount as a single unit to measure lateral (transverse) strain averaged over two locations.
  • Built-in mechanical over-travel stops provide protection in both directions.
  • Self supporting on the specimens.
  • Meets requirements for accuracy and a verification certificate is included with each unit.
  • Rugged, optimized, parallel flexure design for strength and improved performance.
  • Replaceable, tool steel, rounded knife edges.
  • High and low temperature options extend operation range from -270°C to +200 °C (-454 °F to +400 °F).
  • Connectors to interface to nearly any brand of test equipment.
  • Stand alone signal conditioners for use with DAQ boards.
  • High-Toughness, and specialty knife edges.

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

Output: 2 to 4 mV/V, nominal.

Linearity: ≤0.15% of full scale measuring range.

Standard Temp. Range: -40 °C to +100 °C (-40 °F to 210 °F) (optional temperature ranges available)

Cable: Standard 2.5 m (8 ft), ultra-flexible cable.

Quick Attach System: Fits samples up to 25 mm (1.000") wide.

Operating Force: Typically less than 50 g.

If you have any questions, please call or click request button below.

r-Value Extensometer - Model ETVR

Averaging transverse (lateral strain), strain gauge based extensometers for measuring plastic strain ratio (r-value) in sheet metals.  May be used simultaneously with a model EAG axial extensometer. Full scale measuring ranges of 2 mm or 0.075" and temperature ranges from -270 °C to 200 °C.

Robust, Parallel Flexure Design

optimized for high linearity, performance, and ruggedness


ASTM E517 and ISO 10113

designed and verified to meet current standards


Over 10 Years Serving the Industry

we will be there with service and support when you need it


Our model ETVR r-Value extensometer is built with a modular design. This allows us to supply the exact measuring range and temperature range required for your test. Please contact us if your particular configuration is not listed.

Ordering Information: Model ETVR-____-_
Measuring Range:
Temperature Range:


200M = 2 mm

075T = 0.075 in

S = -40 °C to +100 °C

L = -270 °C to +100 °C

H = -40 °C to +200 °C

X = -270 °C to +200 °C

Model ETVR is available in almost any configuration of measuring range and temperature range listed above. Other configurations are available; please contact Reliant with your requirements.

Example: ETVR-200M-S

(2 mm measuring range and standard temperature option)

Reliant Technology LLC.

2334 E Boulder Street

Colorado Springs, CO 80909 USA


Questions or Repair?

If you have any questions or would like a quote, please contact us HERE.

If your extensometer is in need of service or repair, please fill out an RMA form HERE.