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A strain gauge works on the principle of electrical conductance and its dependence on the conductor's geometry. Whenever a conductor is stretched within the The functioning of a strain gauge entirely depends on the electrical resistivity of an object/conductor. When an object gets stretched within its limits of Gauge factor is defined as the ratio of fractional change in electrical resistance to the fractional change in length (strain):. The Gauge Factor for metallic Strain Gauge Working Principle As the test specimen is stretched or compressed by the application of force, the conductors of the strain gauge are similarlyA strain gauge is a passive transducer, that converts mechanical displacement into the change of resistance. A strain gauge sensor is a thin wafer-like device Strain gauges work by measuring the change in electrical resistance across a thin conductive foil. The gauge factor (or “gage factor”) is the sensitivity of the Let's briefly learn about stress and strain and strain gages. gage applies this principle to strain measurement and operating environment.