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High Temperature Clip-On Gages (700 °C) – Model 7641

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Designed for fracture mechanics testing in environmental chambers where the entire gage must be exposed to elevated temperatures. These capacitive sensors may be used up to 700 °C (1300 °F) without any cooling.

These COD gages 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 7641 is ideal for determination of fracture mechanics parameters such as JIC, KIC, R-curve, fatigue crack growth rate (da/dN), and testing to standards such as ISO 12135, ASTM E1820, E399, E647, etc. All units can be displaced slightly in compression for ease of installation.

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The COD gage is supplied with the advanced DT6229 controller. The standard output is 0-10VDC analog signal, factory calibrated with the COD gage. 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.

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The 7641 is readily interfaced with most existing test controllers and may be directly connected to a data acquisition system or chart recorder, or directly to a PC. The 7641 may be used for strain-controlled tests such as JIC.

The Model 7641 INTRODUCES SEVERAL IMPROVEMENTS to Epsilon’s offerings for an uncooled, axial extensometer including:

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  • A new body style to optimize mechanical performance and reduce weight and size

  • A new probe design that also provides many improvements including lower noise, better frequency response, improved flexibility and durability

  • Increased operational temperature

  • The ability to store calibrations of multiple extensometers with one signal conditioner

Epsilon Model 7641 Extensometer
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