Extensometers for materials testing

Submersible Extensometers – Model 4030

Submersible extensometer designed for performing tests in water, saline solutions, and other liquids compatible with the materials of construction.

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.

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.

These are made entirely of stainless steel with Teflon cables. They can also be supplied with ceramic knife edges and heat shrink tubing over the quick attach kit wires, to eliminate any galvanic corrosion issues with test samples.

Contact Epsilon or email for help with configuring a system to meet your test needs.

Download Data Sheet

  • Signal conditioner and power supply included. Easily interfaced to test controllers, data acquisition boards, and chart recorders.
  • Shipped fully calibrated with electronics (traceable to NIST) with user specified voltage output.
  • Includes high quality foam lined case.

Download Data Sheet

Input: Includes power supply for your country (specify)

Output: User specified, +/-5 VDC or +/-10 VDC typical

Linearity: ≤1.0% of full scale measuring range, depending on model

Temperature Range: -40 °C to +100 °C (-40 °F to 210°F)

Cable: 0.45 m (1.5 ft), multi-stranded, shielded, SS reinforced, Teflon® insulated

Standard Quick Attach Kit: Fits round samples up to 12 mm (0.5 inch) diameter and flats to 12 mm thick by 12 mm wide (0.5 inch by 0.5 inch)

Environment: Submersible in water and other liquids compatible with materials of construction

Download Data Sheet

Why Epsilon?

Epsilon’s extensometers are DESIGNED FOR VERY HIGH ACCURACY, with performance significantly better than required by many testing standards and conforming to the highest requirements of ASTM E83 and ISO 9513.

Nearly every model we make incorporates a RUGGED MEASUREMENT MODULE AND OVER-TRAVEL STOPS for durability.

Before shipment, EPSILON CALIBRATES EVERY EXTENSOMETER WE MAKE to ISO 17025 requirements.


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

Our 2018 Extensometer Catalog, Version 110 is now available! Not finding something you’re looking for? Ask us about a custom quote.