


Expandomatic pH meter by Beckman
1970

Cambridge pH meter
1960

PH meter
1950

Pye model 79 pH meter

pH meter

One Beckman Model G pH meter & electrode

PYE pH meter

Cambridge Instrument Company Ltd PH meter
1950

Cambridge pH meter, serial no. 24871

Marconi pH meter

pH meter type D-303-B/C

Pye pH meter, model 78, 1969
1969

Cambridge bench pH meter serial no. L334784
1940-1949

pH Meter `Zeromatic'. Serial no.1477
1900-1980

Open University pH meter and probe
1990-1996
PH meter by Cambridge Instrument Co
Collection of instruments made by Electronic Instruments Ltd
1946-1965
pH Meter 27
1900-1980
pH Meter Type TF 717. No.R2609 dated 6.7.50
1900-1980
pH meter
1950-1980
pH meter type D-303-B with spare dip electrode made by Muirhead and Co. Ltd.
1940-1950
Cambridge Instrument Company PH meter
1936
Portable Camlab pH Meter, 1997
1997
Portable pH Meter, 1985-1995
1985-1995
Pye "Dynocap"
PH meter
1950
pH meter
1957
PH meter by Marconi Instruments
Pye-Unicam 292 MKII pH meter with attached Electrode
Radiometer PHM61 pH meter
1980-1989
Pye pH meter (cat no. 11070) c. 1961
1961
Cambridge Instrument Company pH meter patent no.396817
1956
pH meter type D-449-A, with electrodes and tray
1948