<Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2009) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2009) (Learn how and when to remove this template message) </Td> </Tr> <P> Gauge factor (GF) or strain factor of a strain gauge is the ratio of relative change in electrical resistance R, to the mechanical strain ε . The gauge factor is defined as: </P> <Dl> <Dd> <Dl> <Dd> G F = Δ R R ε = Δ ρ ρ ε + 1 + 2 ν (\ displaystyle GF = (\ frac (\ frac (\ Delta R) (R)) (\ varepsilon)) = (\ frac (\ frac (\ Delta \ rho) (\ rho)) (\ varepsilon)) + 1 + 2 \ nu) </Dd> <Dd> Or </Dd> <Dd> Gf = change in resistance / (resistance * strain) </Dd> </Dl> </Dd> </Dl>

What is the gauge factor of a strain gauge