公开(公告)号：WO1991011708A1

公开(公告)日：1991-08-08

申请号：PCT/US1991000400

申请日：1991-01-22

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  WEST, Barry, R. ,  WOOD, Wyane, B. ,  OKEL, Mark, C.

IPC: G01N27/02

CPC classification number: G01R27/22 ,  G01N27/023

Abstract: An inductive conductivity sensor (10) is immersed in a liquid to measure its conductivity. The sensor (10) comprises a transducer (18, 20, 22) for generating a changing magnetic field and for inductively measuring an electric current induced in the liquid by the changing magnetic field. The transducer (18, 20, 22) has an external surface facing the liquid. An elastic membrane (30) separates the external surface from the liquid. The elastic membrane (30) is periodically inflated and deflated to deform its outer shape and thereby remove deposits formed on the membrane (30).

公开(公告)号：EP0512025B1

公开(公告)日：1996-03-27

申请号：EP91903544.4

申请日：1991-01-22

Applicant: ROSEMOUNT INC.

Inventor： WEST, Barry, R. ,  WOOD, Wyane, B. ,  OKEL, Mark, C.

IPC: G01N27/02

CPC classification number: G01R27/22 ,  G01N27/023

Abstract: An inductive conductivity sensor (10) is immersed in a liquid to measure its conductivity. The sensor (10) comprises a transducer (18, 20, 22) for generating a changing magnetic field and for inductively measuring an electric current induced in the liquid by the changing magnetic field. The transducer (18, 20, 22) has an external surface facing the liquid. An elastic membrane (30) separates the external surface from the liquid. The elastic membrane (30) is periodically inflated and deflated to deform its outer shape and thereby remove deposits formed on the membrane (30).

公开(公告)号：EP0512025A1

公开(公告)日：1992-11-11

申请号：EP91903544.0

申请日：1991-01-22

Applicant: ROSEMOUNT INC.

Inventor： WEST, Barry, R. ,  WOOD, Wyane, B. ,  OKEL, Mark, C.

IPC: G01N27 ,  G01R27

CPC classification number: G01R27/22 ,  G01N27/023

Abstract: On immerge un capteur de conductivité inductif (10) dans un liquide pour mesurer sa conductivité. Le capteur (10) comprend un transducteur (18, 20, 22) permettant de générer un champ magnétique variable et de mesurer de manière inductive un courant électrique induit dans le liquide par le champ magnétique variable. Le transducteur (18, 20, 22) présente une surface externe face au liquide. Une membrane élastique (30) sépare la surface externe du liquide. La membrane élastique (30) est périodiquement gonflée et dégonflée de façon à déformer sa forme externe et retirer ainsi des dépôts formés sur la membrane.