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Why semiconductor strain gauges typically have much higher gauge factors than those of metallic strain gauge?

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Gauge factor = (delta R/ R)/ Strain, Basic principle of operation of operation of semiconductor strain gauge is the piezoresistive effect . This effect is the basic cause of high changes of resistance on strained. so its gauge factor is high. Other hand in mettalic strain gauge, the cause of change...
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Gauge factor = (delta R/ R)/ Strain, Basic principle of operation of operation of semiconductor strain gauge is the piezoresistive effect . This effect is the basic cause of high changes of resistance on strained. so its gauge factor is high. Other hand in mettalic strain gauge, the cause of change of resistance when strained, is only change in shape of metal so its more low compare than semiconductor. If you want to know more about piezoresistive effect or any confusion, tell me . Thank You. read less
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Project Testing & Commissioning Engineer

Due to piezoresistive effect.
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