Pressure Transducers
Miniature Series
(In six configurations)

Load Cells
Miniature Series
(In two small sizes)

Extensometers
(In four basic styles)

Transducer And Strain Indicator

Extensometers

Model E 50.20 Model E 50.20 is an extensometer designed for relatively large strain levels, using a 50 mm gauge length and accepting strains up to 20 percent. The features of this instrument include: Easy to handle and attach, with no danger of damage to sensing unit. Positive stop to ensure exact gage length. Overstrain protection link-extensometer will only respond up to design strain level. Replaceable hardened and ground contact surfaces. Output can be read with any conventional strain indicator. Factory calibrated.	Model E 50.20 Click image to enlarge.
This unit is ideal for teaching laboratories in materials and material properties, since it will allow strains to be read on tensile specimens without the need for expensive and time consuming strain gage application. It can be used over and over again, and when needed the contact points can be replaced easily and quickly. Due to it's large strain range, it is well suited to non-metallic materials such as plastics .
Model E 40.06 Click image to enlarge.   Model E 15.15 Click image to enlarge.
Model E 40.06 & Model E 15.15 This extensometer uses modular components which allow for easy design variations. The photo on the left shows a standard form of 40 mm (1.6 in.) gage length designed for a limited 6% strain range. The photo on the right shows a miniature version using a 15 mm (0.6 in.) gage length with a 15% strain range. All models employ a 350 ohm full bridge configuration and use a specially constructed extra flexible cable. Due to the modular design these may be built in many gage lengths and sizes, and so can be tailored to a variety of applications. Output is high, approximately 3 to 4 mv/v F.S., and can be read on any strain or transducer indicator. Check with us to determine if a specific model of this design will fit your requirements.
Model E 50.30 Modeled E 50.30 is a new highly advanced extensometer designed primarily for very large strain ranges, in this case 30% based on initial gage length of 2.00 inches. It is simple to use, similar to Model E 50.20, yet it is capable of accurately tracking strains up to the full maximum limit. This makes it useful in tests on plastics, elastomers and other non-metallic materials. Conventional resistance strain gages cannot operate successfully at these high strain levels, and in some cases they may stiffen soft materials locally and be inaccurate even at low strain levels. It is furnished with complete calibration data and full instructions for use.	Model E 50.30 Click image to enlarge.
Model E 6.40 Model E 6.40 extensometer is designed for fracture mechanics studies such as determination of KicJic and crack growth. It is intended for use in specimens with a 0.2 to 0.25 inch crack opening dimensions, such as specified in ASTM E399. Due to its small size and high sensitivity, it may also be used as a very sensitive extensometer in compression studies.	Model E 6.40 Click image to enlarge.
In this design, a pair of double cantilever arms are rigidly attached to a mounting block. Strain gages on the arms form a full bridge. Spring forces to compress the arms are high enough so that the extensometer is self-supporting when compressed and inserted in a machined crack and no auxiliary supports are needed. The recommended range of motion for the cantilevered arms is 0.15 to 0.3 inches. This unit is small, light and quite rugged so it is capable of daily use. It can be modified upon special order for other crack opening dimensions, but is normally furnished for the 0.20/0.25 inch crack size.

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