Low Impedance Bridge for the Measurement of Level of Liquid Metals
Julius Hyman · Review of Scientific Instruments · 1961
A means is described whereby the liquid level of sodium or other conducting liquids may be determined within a sealed metal system. The measurement obtained is that of electrical resistance in an attached drain tube used as a metal ``sight tube.'' A large alternating current is induced for the measurement by using the sealed metal system itself in conjunction with the ``sight tube'' as a one turn secondary of a transformer. Techniques necessary for application and temperature compensation are discussed.