Due to supply issues this model is presently not available. Contact Epsilon if you have an application that requires a submerged extensometer and you want to be notified by Epsilon when we introduce a submersible extensometer.

Submersible Extensometers – Model 4030

Submersible extensometers 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).

These are made entirely of corrosion-resistant materials, with Teflon cables and tough stainless steel knife edges. Optionally, they can also be supplied with ceramic knife edges and electrically isolated quick attach kit wires to minimize galvanic corrosion with test samples.

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

Download Data Sheet

  • Signal conditioner and power supply included, for interface to test controllers, data acquisition boards, etc.
  • Shipped fully calibrated with electronics (traceable to NIST).
  • Designed for monotonic tests. Epsilon does not recommend this model for strain control or cyclic testing applications.
  • Includes high quality foam lined case.

Download Data Sheet

Analog Output: Up to ±10V

Gauge Length: 4030: May be in the range 10 – 25 mm (specify when ordering)

Measuring Range: May be in the range 2.5 – 5.0 mm (specify when ordering)

<±100µm as supplied from Epsilon
<±5µm with 3rd order polynomial linearization performed in the customer’s electronics

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

Power: Includes power supply for your country (specify)



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.

Model Number:



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

Get Our Newsletter

Sign up for our newsletter to get the most up-to-date information on products and services.

Download Catalog

Our 2022 Extensometer Catalog, Version 110 is now available! Not finding something you’re looking for? Ask us about a custom quote.