US PATENT SUBCLASS 204 / 662
.~.~.~ Liquid level sensing means

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
660  DF  .~ Apparatus for electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation) {10}
661  DF  .~.~ With control means responsive to sensed condition {1}
662.~.~.~ Liquid level sensing means

DEFINITION

Classification: 204/662

Liquid level sensing means:

(under subclass 661) Apparatus in which means are provided to detect the height of a liquid level or a change therein and to control operation of the apparatus based upon the detected level or change therein.