astatic galvanometer

American  

noun

Electricity.

1. a galvanometer that is unaffected by the earth's magnetic field and is used for measuring small currents.

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Etymology

Origin of astatic galvanometer

First recorded in 1865–70

Example Sentences

Electrical Measurement.—Faraday’s ideas thus pressed upon electricians the necessity for the quantitative measurement of electrical phenomena.10 It has been already mentioned that Schweigger invented in 1820 the “multiplier,” and Nobili in 1825 the astatic galvanometer.

From Project Gutenberg

Astatic needle, a magnetic needle having another needle of the same intensity fixed parallel to it, the poles being reversed, so that the needles neutralize one another, and are unaffected by the earth's magnetism; used in the astatic galvanometer.

From Project Gutenberg

Quartz fibres have two great advantages over other forms of suspension when employed for any kind of torsion balance, from an ordinary more or less "astatic" galvanometer to the Cavendish apparatus.

From Project Gutenberg