|Object Type:||Test Equipment|
|Object Name:||Portable Wheatstone Bridge|
|Manufacturer:||WG Pye & Co|
|Year of Manufacture:||circa 1960|
|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.