The model 7675 is ideal for the determination of Poisson's ratio, and for characterizing anisotropic materials such as composites. The Rugged, dual flexure design for strength and improved performance enables also cyclic testing at higher frequencies.

All units can handle both positive and negative displacements. These extensometers are compatible with a number of Model 7642 hightemperature axial extensometers.

The extensometer come standard with a freestanding sensor conditioner unit providing a electric calibration 0-10 V signal output with exceptionally low noise that can be connected to the strain channel of the controller of the testing system. This conditioner system provides a number of functional enhancements, including high speed digital output, built in calibration and tare functions, analogue and digital filters, and more.

Features

• May be left on through specimen failure

• Self-supporting on specimen

• Standard configurations meet ISO 9513 class 0,5 and ASTM E83 class B-1 requirements for accuracy.

• Better resolution, accuracy, and noise rejection at high temperature

• Minimized size and weight, and better high frequency performance

• All standard models are ideal for cyclic testing, >25 Hz is typical

• Digital controller and power supply included. Provides high level DC voltage output with low noise. Easily interfaced to test controllers, data acquisition boards, and chart recorders.
  - Includes high speed analogue and digital outputs
  - Intuitive web-based user interface for setup, calibration, and data acquisition
  - Built-in calibration reference and auto-zero features
  - Multiple extensometer calibration files may be loaded for use with one controller
  - Multiple temperature-specific calibrations may be stored
  - Selectable analogue and digital filter options from 2 Hz to 3 kHz

• Mechanical over-travel protection

• Delivered fully calibrated with electronics (traceable to NPL (UK)) with user specified voltage output

• Ideal for measuring Poisson's ratio per ASTM E132 with most materials and specimens

• Durable stainless steel knife edges

• High quality foam lined case is provided

• Rugged, dual flexure design for strength and enhanced performance. The next-generation design enables cyclic testing at much higher frequencies