An improved construction of the Smith bridge, type 3
C R Barber, A Gridley, John A. Hall · Journal of Scientific Instruments · 1955
A new construction of a bridge for resistance thermometry according to the design of F. E. Smith is described, and details of the layout, methods of construction and temperature control are given. The bridge incorporates a new type of resistance coil of high stability and has been shown to be capable of measuring resistances with a reproducibility of a few parts in 10 7 without the need for frequent re-calibration.