Galvanometer, England, 1921
Galvanometer string, brass, in wooden case, made by Cambridge Instrument Co., English, 1921
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A galvanometer measures small electric currents. It is sometimes used during physiological experiments studying muscle contractions. Electrodes placed upon the body pick up minute electrical impulses. These cause a string within the galvanometer to move. Movement is recorded photographically to make a tracing. The galvanometer is one of the earliest instruments used to detect and record electrical activity in the heart. It forms the basis of electrocardiograph machines.
- Measurements:
-
overall: 140 mm x 300 mm x 100 mm, 1.9kg
- Materials:
- brass , glass , case, wood , case, brass and case, felt
- Object Number:
- 1979-731/1
- type:
- galvanometer
- Image ©
- The Board of Trustees of the Science Museum
