US PATENT SUBCLASS 210 / 739
.~ Including controlling process in response to a sensed condition

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
739.~ Including controlling process in response to a sensed condition {7}
740  DF  .~.~> Density or specific gravity sensing
741  DF  .~.~> Pressure sensing
742  DF  .~.~> Temperature sensing
743  DF  .~.~> pH sensing
744  DF  .~.~> Level sensing
745  DF  .~.~> Turbidity or optically sensing
746  DF  .~.~> Electrical property sensing

DEFINITION

Classification: 210/739

Including controlling process in response to a sensed condition:

(under subclass 600) Process in which a probe or sensor conveys to an actuating means a change in, or the existence predetermined parameter, a condition in the liquid being treated and the actuating means varies, ceases, or initiates at least one element of a treatment.

(1) Note. The sensing of the condition may be prior to or subsequent to the treatment and includes the condition of either influent or effluent.

(2) Note. The operation is "automatic" and requires action

by the apparatus and does not include use of, for example, an overflow standpipe or a human attendant.

SEE OR SEARCH CLASS

364, Electrical Computers and Data Processing Systems, especially

528.01+, for a computerized control of a chemical process.