A bottle containing 5gms of pH indicator

Experimental Chemistry

c. 1960

A metal vial containing 5gm of pH indicator

Experimental Chemistry

c. 1960

pH indicator papers

Laboratory Medicine

A vial containing 1gm of pH indicator

Experimental Chemistry

c. 1960

A bottle containing 5gms of pH indicator

Experimental Chemistry

c. 1960

A vial containing 1gm of pH indicator

Experimental Chemistry

c. 1960

A bottle containing 5gms of pH indicator

Experimental Chemistry

c. 1960

A bottle containing 5gms of pH indicator

Experimental Chemistry

c. 1960

A bottle containing 5gms of pH indicator

Experimental Chemistry

c. 1960

A bottle containing about 10 gms of haematoxylin pH indicator made by Griffin & George Limited

Experimental Chemistry

c. 1960

A 100ml bottle of Alkaline methylene blue

Experimental Chemistry

c. 1960

A bottle containing 25 gms of Ehrlich Haematoxylin

Experimental Chemistry

c. 1960

Cambridge pH meter

Experimental Chemistry

1960

Skinfold callipers for estimating body fat, England, 1954-1960

Psychology, Psychiatry & Anthropometry

1954-1960

A perspex box conaining plastic strips with indicator paper at the end

Experimental Chemistry

c. 1980

ramsbottom speed indicator

Locomotives and Rolling Stock Components

1860

Station bay indicator

Signalling & Telecommunications

A perspex box containing six books of universal indicator papers

Experimental Chemistry

1970-1977

Reversible line indicator

Signalling & Telecommunications

compass

Hand and Machine Tools

1700-1800

Hughie Greene's Clapometer (Audience Reaction Indicator)

Television

1956-1978

PH meter

Experimental Chemistry

1950

Direct reading pH meter

Science Teaching

1950-1970

Beckman model G pH Meter

Biochemistry

1945

Simplex patent steam engine indicator

Motive Power

High magnification fiducial indicator

Industrial Metrology

1959

Station destination indicator, Bishop Auckland station - North Eastern Railway

Fixtures & Fittings from Railway Buildings

Meridional compass: Rare George Adams Brass: Walker

Navigation

Train indicator board, Great Western Railway

Fixtures & Fittings from Railway Buildings

1930

Sony Ericsson PH 388 Mobile Phone

Telecommunications

1999

pH meter model 7020. E.I.L., Richmond, Surrey

Experimental Chemistry

Wright maximum demand electricity indicator

Electricity Supply

C.D. Indicator

Mathematics

Oval dynamometer with central scale with indicator

Psychology, Psychiatry & Anthropometry

1840-1880

Industrial pH transmitter

Experimental Chemistry

1950

pH meter

Experimental Chemistry

McNaught Indicator

Motive Power

1819-1923

Cambridge Instrument Co. Ltd. pH meter

Experimental Chemistry

Portable pH meter

Experimental Chemistry

1979

Direct reading pH meter

Experimental Chemistry

Laboratory pH meter model 7030

Experimental Chemistry

Vibron blood pH meter

Experimental Chemistry

Portable pH meter

Experimental Chemistry

pH meter module

Science Teaching

1960-1979

Engine indicator by Thompson & Bushnell

Motive Power

pH meter model 7010. E.I.L., Richmond, Surrey

Experimental Chemistry

Glass pH electrode

Experimental Chemistry

1960-1970

Maihak engine indicator No.7077

Motive Power

'Calormeter' for motor vehicle radiator water temperature indicator

Road Transport

1920-1939

Pye model 79 pH meter

Experimental Chemistry