Gauge Ratio

A constant value of the change in the gauge resistance after distortion is applied. Usually, a gauge ratio K is adjusted to be 2.00. Consequently, a strain gauge converter shows the amount of distortion by using gauge ratio of 2.00. It is expressed with the equation below where: ε: Distortion, ΔL: Displacement of an object, L: Original length of an object, ΔR: Change in resistance of a strain gauge, R: Resistance of the strain gauge, K: Gauge ratio: ε = (ΔL/L) = (ΔR/R) / K