Everything about Lippmann Electrometer totally explained
A
Lippmann electrometer is a device for detecting small rushes of
electric current. It was invented by
Gabriel Lippmann. The device consists of a U-tube which is thick on one end and very thin on the other. The thin end is designed to act as a
capillary tube. The u-tube is half filled with
mercury with a small amount of dilute
sulfuric acid above the mercury in the capillary tube. Metal wires are connected at the fat end into the mercury and at the thin end into the sulfuric acid.
When the pulse of electricity arrives it changes the
surface tension of the mercury and allows it to leap up a short distance in the capillary tube. This device was used in the first practical
ECG machine which was invented by
Augustus Desiré Waller.
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