A Wheatstone bridge is one of those handy circuits that has plenty of uses in both AC and DC measurements. We probably see them most often in a strain gauge.

the Wheatstone bridge circuit, and giving rise to an output voltage proportional to the deformation. The ratio of the change in length to the gauge length is the average strain of the sample between ...

These detect changes in buildings, bridges and other structures. Pictured is a Wheatstone bridge with a strain gauge as R4. Stretching a strain gauge causes a change in its resistance ...