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Flexible membrane encapsulated strain measurement instrument and method of manufacture

Image Number 7 for United States Patent #7040156.

A flexible membrane for use in test cells includes instrumentation within the thickness of the membrane to accurately measure a property of a material including stresses, strains, deformation, temperature, moisture potential and moisture content of the sample. A test sample is enclosed within the membrane to isolate the specimen from testing fluids in the test chamber. The instrumentation may measure axial strains or radial strains or both.

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