Patent ID: 7279903
Filing Date: 2007-10-09
Classification: G01N

Abstract:
1. An electrodeless conductivity sensor, comprising: an electrically non-conductive conduit defining a passage for the flow of a process fluid in a downstream direction, said conduit having an inlet and an outlet; said conduit diverging downstream of the inlet into first and second legs, said legs re-converging upstream of said outlet, to form a fluid-flow loop between said inlet and said outlet; at least one first toroid configured as a first type coil disposed about one of said first and second legs; at least one second toroid configured as a second type coil disposed about one of said first and second legs; said first type and second type coils selected from the group consisting of drive and sense coils; an electrically non-conductive elongated holder extending into said passage; and a temperature detector disposed within said holder, wherein process fluid flowing in the downstream direction passes on opposite sides of, while remaining free of physical contact with, said temperature detector.