The extensometer design, quality and sensing components are all "state of the art". All the instruments  incorporate features which accommodate them for use and handling by a wide range of researchers, technicians and students.

EEECO extensometers use three kinds of linear measuring systems: mechanical  and electronic  dial gages, Linear Variable Differential Transformers (LVDT),and linear encoded devices.The dial gages are simple and require no auxiliary equipment .The LVDT is highly precise, infinitely variable and provides electronic signaling through readout devices to your computer or plotter.The encoded devices are self contained for long-range measurement and generate a usable signal for recording.
All of the extensometers are designed in a linear fashion to avoid typical cosine error and the resultant need for mathematical correction.

Typical instrument design features provide for  ease of clamping, changes in gage length and range, specimen configuration, and separability under specimen failure. In addition the instruments can be adapted for testing a large variety of materials such metals, plastics rubber wood concrete and composites etc.

EEECO extensometers are available in the following types as described below.

Dial Gage Extensometer : type EXA
This  type extensometer consists of a body which accommodates a precision square sliding member, a knife edge and clamping system. The sliding member carries a knife edge and a clamp. The instrument is attached to specimens at a preset gage length. Spring plungers secure round or flat specimens to the knife edges. As the specimen is elongated the slide can continue through to separation. This avoids shock due to forced extension. This series has the ability to accommodate a variety of dial gages, LVDT probes and electronic indicators. Gage length change accessories are available that allow a given extensometer to be used at any one of the incremental steps provided for by each accessory.

EXA2DG : Dial Gage Extensometer