The Anderson loop was developed in the Aerostructures Branch of the NASA Dryden Flight Research Center, Edwards, California, USA for use in high temperature structural tests. The need was to eliminate the measurement errors that arise when lead wires pass through severe environments, especially large temperature variations or slip rings, as they connect transducers to their signal conditioning. In meeting this need, a fundamental electrical measurement circuit topology was developed that, in many applications, significantly outperforms the classic Wheatstone bridge and standard Kelvin circuits. NASA patented the Anderson loop and is using the circuit in several of their research centers.