(under subclass 299) Gauges wherein the gauge mechanism as a whole or the pressure responsive portion thereof is peculiarly adapted to be lowered as a unit to the bottom of the liquid to take a reading of hydrostatic pressure as a function of depth. An indicator at the surface may be suitably connected to the pressure responsive device.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
715, and 720 for devices for sounding by the use of a line and weight.
