High Temperature Transverse Extensometers (700 °C) – Model 7675

Model : 7675

Applied Standard

  • These transverse extensometers use a high-temperature capacitive sensor and do not require any cooling. 
  • They will operate up to the maximum temperature limit of most environmental chambers used in materials testing. 
  • The Model 7675 is ideal for determination of Poisson’s ratio, and for characterization of anisotropic materials such as composites. 
  • All units can accommodate both positive and negative displacements. Model 7675 transverse extensometers are compatible with most Model 7642 high-temperature axial extensometers.
  • The 7675 is supplied with the advanced DT6229 controller. The standard output is 0-10VDC analog signal, factory calibrated with the extensometer. 
  • This system provides a number of functional enhancements, including high speed digital output, built in calibration and tare functions, analog and digital filters, and more.


  • May be left on through specimen failure. 
  • Self-supporting on specimen. 
  • Improved accuracy, resolution, and noise rejection at high temperature. 
  • Reduced size and weight, and improved high frequency performance. 
  • All standard models are suitable 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 analog 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 analog and digital filter options from 2 Hz to 3 kHz
  • Ships fully calibrated with electronics (traceable to NPL (UK)) with user specified voltage output. <
  • Mechanical over-travel protection. 
  • Suitable for measuring Poisson’s ratio per ASTM E132 with most materials and specimens. 
  • Durable stainless steel knife edges. 
  • Includes high quality foam lined case.
  • Rugged, dual flexure design for strength and improved performance. The next-generation design enables cyclic testing at much higher frequencies.

Load frame


  • Reverse cable exit available
  • Connectors to interface to nearly any brand test equipment
  • Bulkhead adapters for vacuum chambers
  • Dual-channel DT6229 controller
  • Specialty knife edges


  • Analog Output: User specified, +/-5 VDC or +/-10VDC typical, ±10.8VDC rail
  • Digital Output: 24 bit high speed Ethernet output with built-in web interface
  • Linearity: 11 point linearization, ≤0.1% of full scale typical
  • Resolution: <55 PPM (0.006%FS) RMS@4 kHz, &lt;6 PPM (0.0006%FS)@100 Hz
  • Cyclic Testing: &gt;25 Hz typical
  • Analog Filter: Selectable 100 Hz analog and 2 Hz - 3 kHz digital filters
  • Temperature Range: Ambient to 700℃(1300°F). Use up to 800℃ is possible – contact Epsilon for details. Springs may require periodic adjustment or replacement after long-term testing above ~600℃
  • Temperature Sensitivity (Gain): <100 PPM/℃ (0.01%FS/℃) typical
  • Temperature Sensitivity (Offset): 20 PPM/℃ (0.002%FS/℃) typical
  • Sensor Cable: 0.7 m (2.5 ft) tri-axial high temperature cable, plus 1.5 m (5 ft) room temperature extension cable
  • Specimen Size: Fits round samples up to 25 mm (1.0 inch) diameter and flats to 25 mm (1.0 inch) wide
  • Operating Force: 1-2 kgf (30-60 oz) typical, depending on model
  • Environment: Recommended for elevated temperature testing in dry air, inert / non-corrosive gases, or vacuum
  • Power: Includes power supply for your country (specify)