The Museum of Applied Arts and Sciences acknowledges Australia’s First Nations Peoples as the Traditional Owners and Custodians of the land and gives respect to the Elders – past and present – and through them to all Aboriginal and Torres Strait Islander peoples.
Aboriginal and Torres Strait Islander peoples are advised that the MAAS website contains a range of Indigenous Cultural Material. This includes artworks, artifacts, images and recordings of people who may have passed away, and other objects which may be culturally sensitive.
2005/98/1 Portable pH meter, with batteries (5), used in the baking operation of manufactured biscuits, wood / metal / paper / glass, made by N. L. Jones, Sandringham, Victoria, Australia, 1952-1957, used by George Weston Foods Ltd, Biscuit and Cake Division, Camperdown, New South Wales, Australia,. Click to enlarge.

Portable pH meter used by Westons Foods

Made by N. L. Jones in Sandringham, Victoria, Australia, 1952-1957.

This pH meter was made in Melbourne in the 1950s and used at the George Weston biscuit factory in Sydney. Quality control scientists randomly selected partly cooked dough from the production line, mixed it with distilled water and inserted the meter’s glass electrode into the resulting solution. The pH reading, a measure of the acidity of the solution, indicated the proportion of leavening agent left in the dough and hence the time required to complete the cooking process.

Debbie Rudder

This ...

Summary

Object No.

2005/98/1

Object Statement

Portable pH meter, with batteries (5), used in the baking operation of manufactured biscuits, wood / metal / paper / glass, made by N. L. Jones, Sandringham, Victoria, Australia, 1952-1957, used by George Weston Foods Ltd, Biscuit and Cake Division, Camperdown, New South Wales, Australia, 1952-1980

Physical Description

The meter was used to measure pH during baking of biscuits at George Weston Foods Ltd, Biscuit and Cake Division in Camperdown, New South Wales. The meter is contained in a portable wooden box; it is a Model B pH electrometer which uses a simple null detector method, which is one of the earliest forms of electronic pH detection methods. There are printed instructions attached to the inside of the lid, black coloured controls on top of the box, direct read-out of pH on small scale marked 1-14. It is powered by a Weston (note: no relation to George Weston) standard cell (inside the box) and has a separate pH electrode and a reference calomel electrode mounted on a small hinged door in the front of the box. Electrical leads from the electrodes are plugged into sockets on the box within the electrode cabinet. The electrode cabinet is lined with metal to form an electrostatic shield.

Marks

Instructions for use are attached to the inside of the lid.Handwritten at the top of the instructions, 'New Cells 8-7-63 (illeg.) / 9-6-65', and at the lower right corner, 'KCI Xtals'.

Inscribed 'MODEL B pH ELECTROMETER / N. L . Jones MELBOURNE' on top of unit at middle centre.

On rims at base of electrical cords within small hinged door, printed 'JONES MELB CAT. NO. 300' on one and 'JONES TYPE A CAT. NO. 100' on the other.

Dimensions

Height

295 mm

Width

270 mm

Depth

330 mm

Production

Notes

This pH meter was manufactured by N. L. Jones at 195 Bay Road, Sandingram, Melbourne. It is of a standard type for its period.

History

Notes

The instrument was used in the biscuit factory of George Weston Foods Ltd, 4 Lyons Road, Camperdown, to measure the pH (level of acidity or alkalinity) of the biscuits while baking. The pH would change with the residual amount of the particular leavening agent - usually sodium bicarbonate. The excess, or lack, of bicarbonate would show the amount of baking remaining to be done or the converse. Nowadays, the baking process is continuously monitored electronically, but previously the pH testing method was the standard baking control technique used world-wide.

Source

Credit Line

Gift of George Westons Food Ltd, 2005

Acquisition Date

30 March 2005

Cite this Object

Harvard

Portable pH meter used by Westons Foods 2019, Museum of Applied Arts & Sciences, accessed 12 November 2019, <https://ma.as/348235>

Wikipedia

{{cite web |url=https://ma.as/348235 |title=Portable pH meter used by Westons Foods |author=Museum of Applied Arts & Sciences |access-date=12 November 2019 |publisher=Museum of Applied Arts & Sciences, Australia}}

Know more about this object?

TELL US

Have a question about this object?

ASK US