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Weston Normal Cell Scientific Instrument

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Weston Normal Cell Scientific Instrument

This is a portable Weston Normal cell, which would have been used as a laboratory standard for voltage. They typically stabilised at around 1.018638 Volts. No current was normally drawn from the cell.
This type of cell was made between 1924-1967 and are no longer in use. We are selling this as a scientific curio/display item only.

The cell consists of a brass cylinder with 4 connections at top. Two marked ‘A’ and the other two marked ‘B’. There is a black plastic knob in the centre top.

Invented by Edward Weston in 1893, it was adopted as the International Standard for EMF from 1911 until superseded by the Josephson voltage standard in 1990.


Weston Normal Cell
1.0183 INT Volts at 20oC
1.032 B.A Volts at 20oC

H Tinsley & Co
London SE

Approximate Dimensions

Diameter: 9cm
Height (Including block): 13.5cm

This beautiful scientific instrument is a must-have for collectors of vintage electronic/physics/science equipment as a display item in an office, University, or man-cave.

H. Tinsley & Co. Ltd

H. Tinsley & Co. Ltd were based in London, England. They were, and still are, manufacturers of Precision Standards and equipment for calibration and measurement. The company started with the manufacture of the first commercially manufactured Weston Standard cells in England in 1905. They are now known as Tinsley Precision Instruments and are based in Surrey, England.

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