.~.~> With fluid displacement or replenishment {1}
DEFINITION
Classification: 73/299
(under subclass 290) Gauges wherein variations in depth are determined by measuring variations in static head at some point normally below the surface of the liquid. These devices usually comprise a pressure gauge with connections to said point below the surface of the liquid in the reservoir.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32+, for gauges of this type combined with means for indicating the specific gravity of the liquid.