Gauge factor


Strain gauge is a device used to measure strain on an object. A strain is a normalized measure of deformation representing the displacement between particles in the body relative to a reference length. Strain measures how much a given deformation differs locally from a rigid-body deformation.
Gauge factor (GF) or strain factor of a strain gauge is the ratio of relative change in electrical resistance R, to the mechanical strain.

Related formulas


GFGauge factor (dimensionless)
DRThe change in resistance caused by strain (ohm)
RGThe resistance of the undeformed gauge (ohm)
ϵThe strain (absolute change in length/original length) (dimensionless)