Portable Wheatstone Bridge

Technical Information

Catalogue No: C0242
Category: General Purpose
Object Type: Test Equipment
Object Name: Portable Wheatstone Bridge
Part No: 7383
Serial No: 46,616
Manufacturer: WG Pye & Co
Division: Unknown
Year of Manufacture: circa 1960
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Made in England
Pye Scientific Instruments
Cat.No. 7383 Ser.No. 46,616
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.

This Wheatstone Bridge was made by WG Pye & Co and probably dates from the 1950’s or 1960’s. It is a four decade instrument with separate divide and multiply switches. Provision is made for an internal or an external battery.

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