Figure 12.11b shows a circuit using the strain gauge. The strain gauge elements are mounted in two arms of the bridge and two resistors, R1 and R2, form the other two arms, R3 and R5 are the conditioning for the zero offset and span, respectively. The output signal from the bridge is amplified and impedance matched, as shown. The strain gauge elements are in opposing arms of the bridge, so that any change in the resistance of the elements due to temperature changes will not affect the balance of the bridge, giving temperature compensation.