Portable Wheatstone Bridge

Technical Information

Catalogue No: C0405
Category: General Purpose
Object Type: Test Equipment
Object Name: Portable Wheatstone Bridge
Part No: 7383
Serial No: 45,801
Manufacturer: WG Pye & Co
Division: Unknown
Year of Manufacture: circa 1955
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Made in England
Pye Scientific Instruments
Cat.No. 7383 Ser.No. 45,801
W.G.Pye & Co Ltd.
Granta Works Cambridge


A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of a wheatstone bridge is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider). It was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. These high quality instruments have a nice solid wooden case and robust controls.

See related item for instructions.

This instrument (asset number 45801) was used in the EMC section of CQD.

Click to enlarge