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Gauge Factor

`GF = ( R_1 - R_0 ) / R_0 / ( L_1 - L_0 ) / L_0 `
`(R_0)"Nominal Resistance"`
`(R_1)"Resistance Due To Strain"`
`(L_0)"Original Length"`
`(L_1)"Strained Length"`
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Physics

The Gauge Factor calculator computes the change in electrical resistance based on the strain on a conductive element.

INSTRUCTIONS: Choose units and enter the following:

  • (R0) Nominal Resistance
  • (R1) Resistance Due to Strain
  • (L0) Original Length of Conductive Element
  • (L1) Strained Length of Conductive Element

Gauge Factor (GF): The factor is returned as a real number.

The Math / Science

The Gauge Factor calculator computes the ratio of change in electrical resistance to the strain on a conductive element.  The strain is the ratio of the change in length to the nominal length, `L_0`.  The change in resistance is measured as the `Delta`R/R, where R is the nominal resistance at nominal length.

GF = (`Delta R` / `R_"Nominal"`) / `epsilon`, where ε =  ΔL / LNominal

Therefore, the formula for Gauge Factor is:

`GF = ((R_1 - R_0)/(R_0)) "/" ((L_1 - L_0)/(L_0))`

where:

  • GF = Gauge Factor
  • R1 = Resistance Due to Strain
  • R0 = Nominal Resistance
  • L1 = Strained Length of Material
  • L0 = Nominal Length or Conductive Material.