PH meter
- Made:
- 1950
- maker:
- Marconi Instruments Limited
This image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicensePH meter, type TF511D, made by Marconi Instruments Ltd
Science Museum Group
© The Board of Trustees of the Science Museum
PH meter, type TF511D, made by Marconi Instruments Ltd., (serial no. 723358), battery operated, c. 1950
