These high accuracy gages are designed for testing at elevated temperatures, much higher than strain gaged based extensometers. The Model 3675 uses a high temperature capacitive sensor and can operate without any cooling at the upper temperature limit of most environmental chambers used in materials testing.

Most often these extensometers are used simultaneously with the Model 3555 axial extensometer for measuring Poisson’s ratio or materials characterization for anisotropic materials like many composites. These units clip easily onto test specimens. A high temperature nickel alloy spring is used to create the force to hold the self-supporting extensometer in place on the sample. It can be used on samples up to 1 inch (25 mm) in width or diameter.

These transverse units are supplied with the Model 3603 signal conditioning electronics. The extensometer and electronics are factory calibrated. The analog output voltage is typically calibrated for 0 to 10 VDC (other ranges are available on request). This can be used directly by data acquisition systems. It usually can be routed to a DC input channel on most test machine controllers as well.

A PDF document containing specifications on the 3675 can be downloaded from the following link: PDF DOWNLOAD.

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• May be left on through specimen failure.
• 3603 signal conditioner and power supply included. Provides high level DC voltage output with exceptionally low noise (typical 0.1 mV on 10VDC output). Easily interfaced to test controllers, data acquisition boards, and chart recorders.
• Shipped fully calibrated with electronics (traceable to NIST) with user specified voltage output.
• All models will measure both positive and negative displacements.
• All standard units have linearity readings of 0.15% or better.
• Includes high quality foam lined case and spare set of tool steel knife edges.
• Rugged, dual flexure design for strength and improved performance. Much stronger than single flexure designs, this also allows cyclic testing at higher frequencies.
• Self-supporting on the specimen

Input: Includes power supply for your country (specify)

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

Linearity: ≤0.15% of full scale measuring range

Temperature Range: elevated temperature use to 540 °C (1000 °F)

Cable: Triaxial ceramic fiber insulated cable 3 ft (1 m) plus 10 ft (2.5 m) extension cable

Specimen Size: Works with samples up to 1 inch (25 mm) width or diameter

Environment: Recommended for elevated temperature testing in air or some other gases